You are absolutely correct! The `Density` property isn't directly readable from a `BasePart` like that. We need to either use the density from existing `CustomPhysicalProperties` if they are set, or provide a default value when creating new `PhysicalProperties`. Let's fix that line in the `makeRagdoll` function. local character = script.Parent local humanoid = character:WaitForChild("Humanoid") local hrp = character:WaitForChild("HumanoidRootPart") local lowerTorso = character:WaitForChild("LowerTorso") local upperTorso = character:WaitForChild("UpperTorso") local head = character:WaitForChild("Head") local userInputService = game:GetService("UserInputService") local runService = game:GetService("RunService") humanoid.BreakJointsOnDeath = false humanoid.RequiresNeck = false -- Allow independent head control -- Constants (Tune these extensively!) local ROOT_ANTI_GRAVITY_FACTOR = 1.05 -- Slightly more than 1 to keep it afloat local ROOT_DAMPING = 8000 -- Horizontal damping force for HRP local TORSO_RESPONSIVENESS = 200 -- Rigidity for AlignOrientation local TORSO_MAX_TORQUE = 50000 local HEAD_RESPONSIVENESS = 150 local HEAD_MAX_TORQUE = 10000 local LIMB_RESPONSIVENESS = 100 local LIMB_MAX_TORQUE = 25000 local FOOT_RESPONSIVENESS = 120 local FOOT_MAX_TORQUE = 20000 local FOOT_FORCE_MAGNITUDE = 1500 -- Base downward force on feet local FOOT_PLACEMENT_OFFSET = 0.1 -- How far out feet should ideally be placed laterally local STEP_HEIGHT = 0.8 local STEP_THRESHOLD = 1.5 -- How far CoM needs to be from CoS to trigger a step local STEP_SPEED_FACTOR = 8 -- How quickly the swing foot moves local MAX_LEAN_ANGLE = math.rad(25) local BALANCE_ADJUST_SPEED = 10 local FALL_ANGLE_THRESHOLD = math.rad(65) -- Angle at which balance assist reduces drastically local SMOOTH_FACTOR = 15 -- General smoothing for target CFrames -- State local isRagdolled = false local attachments = {} -- Store attachments for constraints local constraints = {} -- Store physics constraints (AlignOrientation, VectorForce, etc.) local originalJoints = {} -- Store original Motor6D info local legUpdateConnection = nil local raycastParams = RaycastParams.new() -- Helper: Get or create an Attachment local function getAttachment(parent, name, cframe) local key = parent:GetFullName() .. name if attachments[key] then if attachments[key].Parent ~= parent then -- Re-parent if needed (e.g., after character reset) attachments[key].Parent = parent end attachments[key].CFrame = cframe or CFrame.new() return attachments[key] end local attach = Instance.new("Attachment") attach.Name = name attach.CFrame = cframe or CFrame.new() attach.Parent = parent attachments[key] = attach return attach end -- Helper: Get or create a Constraint local function getConstraint(constraintType, name, parent) local key = parent:GetFullName() .. name if constraints[key] then if constraints[key].Parent ~= parent then -- Re-parent if needed constraints[key].Parent = parent end return constraints[key] end local constraint = Instance.new(constraintType) constraint.Name = name constraint.Parent = parent constraints[key] = constraint return constraint end -- Helper: Safely destroy all managed constraints and attachments local function clearPhysics() if legUpdateConnection then legUpdateConnection:Disconnect() legUpdateConnection = nil end for key, constraint in pairs(constraints) do if constraint and constraint.Parent then constraint:Destroy() end constraints[key] = nil -- Clear from table end for key, attach in pairs(attachments) do if attach and attach.Parent then attach:Destroy() end attachments[key] = nil -- Clear from table end end -- Smoothly interpolate CFrame local function smoothCFrame(current, target, dt, factor) return current:Lerp(target, math.clamp(dt * factor, 0, 1)) end -- Calculate approximate Center of Mass local function getCenterOfMass() -- Simple approximation using torso parts local totalMass = lowerTorso:GetMass() + upperTorso:GetMass() + head:GetMass() if totalMass == 0 then return hrp.Position end -- Avoid division by zero local com = (lowerTorso.Position * lowerTorso:GetMass() + upperTorso.Position * upperTorso:GetMass() + head.Position * head:GetMass()) / totalMass return com end -- Function to start the balancing physics local function startBalancing() clearPhysics() -- Clear any existing physics components raycastParams.FilterDescendantsInstances = {character} raycastParams.FilterType = Enum.RaycastFilterType.Exclude -- Anti-Gravity Force on HRP local rootAttach = getAttachment(hrp, "RootAttachment") local antiGravity = getConstraint("VectorForce", "AntiGravity", hrp) antiGravity.Attachment0 = rootAttach antiGravity.RelativeTo = Enum.ActuatorRelativeTo.World antiGravity.Force = Vector3.new(0, hrp:GetAssemblyMass() * workspace.Gravity * ROOT_ANTI_GRAVITY_FACTOR, 0) antiGravity.ApplyAtCenterOfMass = true -- Apply force more stably -- Horizontal Damping on HRP local damper = getConstraint("LinearVelocity", "HRPDamper", hrp) damper.Attachment0 = rootAttach damper.RelativeTo = Enum.ActuatorRelativeTo.World damper.VectorVelocity = Vector3.new(0, 0, 0) -- Target zero horizontal velocity damper.MaxForce = ROOT_DAMPING damper.PrimaryTangentAxis = Vector3.new(1,0,0) -- Allow damping on X/Z damper.SecondaryTangentAxis = Vector3.new(0,0,1) damper.PlaneVelocityConstraint = Enum.VelocityConstraintMethod.Plane -- Constrain only X/Z -- Torso Orientation Control local torsoAttach = getAttachment(upperTorso, "TorsoAttachment") local torsoAlign = getConstraint("AlignOrientation", "TorsoAlign", upperTorso) torsoAlign.Attachment0 = torsoAttach torsoAlign.Responsiveness = TORSO_RESPONSIVENESS torsoAlign.MaxTorque = TORSO_MAX_TORQUE torsoAlign.PrimaryAxisOnly = false torsoAlign.Mode = Enum.OrientationAlignmentMode.OneAttachment -- Head Orientation Control local headAttach = getAttachment(head, "HeadAttachment") local headAlign = getConstraint("AlignOrientation", "HeadAlign", head) headAlign.Attachment0 = headAttach headAlign.Responsiveness = HEAD_RESPONSIVENESS headAlign.MaxTorque = HEAD_MAX_TORQUE headAlign.PrimaryAxisOnly = false headAlign.Mode = Enum.OrientationAlignmentMode.OneAttachment -- Limb Orientation Control (Setup, targets updated in loop) for _, limbPrefix in pairs({"Left", "Right"}) do for _, limbType in pairs({"UpperArm", "LowerArm", "UpperLeg", "LowerLeg", "Foot"}) do local part = character:FindFirstChild(limbPrefix .. limbType) if part then local attach = getAttachment(part, limbPrefix..limbType.."Attach") local align = getConstraint("AlignOrientation", limbPrefix..limbType.."Align", part) align.Attachment0 = attach align.Responsiveness = (limbType == "Foot" and FOOT_RESPONSIVENESS or LIMB_RESPONSIVENESS) align.MaxTorque = (limbType == "Foot" and FOOT_MAX_TORQUE or LIMB_MAX_TORQUE) align.PrimaryAxisOnly = false align.Mode = Enum.OrientationAlignmentMode.OneAttachment -- Foot Force (Setup, force updated in loop) if limbType == "Foot" then local footForce = getConstraint("VectorForce", limbPrefix.."FootForce", part) footForce.Attachment0 = attach footForce.RelativeTo = Enum.ActuatorRelativeTo.World footForce.Force = Vector3.new(0, 0, 0) -- Initial force footForce.ApplyAtCenterOfMass = false -- Apply at attachment point end end end end -- Leg State Variables local legState = { Left = { TargetPos = nil, IsStance = true, GroundNormal = Vector3.yAxis, ContactPos = nil }, Right = { TargetPos = nil, IsStance = true, GroundNormal = Vector3.yAxis, ContactPos = nil } } local lastTargetTorsoCF = upperTorso.CFrame -- For smoothing -- Main Balancing Loop legUpdateConnection = runService.Heartbeat:Connect(function(dt) if not isRagdolled or not character or not hrp or not humanoid or humanoid:GetState() == Enum.HumanoidStateType.Dead then clearPhysics() return end local currentHrpCF = hrp.CFrame local currentTorsoCF = upperTorso.CFrame local currentLowerTorsoCF = lowerTorso.CFrame local worldUp = Vector3.yAxis local torsoUp = currentTorsoCF.UpVector local torsoRight = currentTorsoCF.RightVector local torsoLook = currentTorsoCF.LookVector -- Check if falling local torsoTiltAngle = math.acos(math.clamp(torsoUp:Dot(worldUp), -1, 1)) local isFalling = torsoTiltAngle > FALL_ANGLE_THRESHOLD local balanceMultiplier = isFalling and 0.1 or 1.0 -- Reduce forces when falling -- Update Anti-Gravity and Damping based on fall state local antiGravity = constraints[hrp:GetFullName() .. "AntiGravity"] if antiGravity then antiGravity.Force = Vector3.new(0, hrp:GetAssemblyMass() * workspace.Gravity * ROOT_ANTI_GRAVITY_FACTOR * (isFalling and 0.2 or 1.0), 0) end local damper = constraints[hrp:GetFullName() .. "HRPDamper"] if damper then damper.MaxForce = ROOT_DAMPING * balanceMultiplier end -- === Raycasting for Foot Placement === local rayOriginOffset = Vector3.new(0, -0.5, 0) -- Start rays slightly below HRP local rayLength = 4 local gravityDir = Vector3.new(0, -1, 0) local raycastResults = {} local totalGroundNormal = Vector3.zero local groundContacts = 0 local avgContactPos = Vector3.zero for _, side in pairs({"Left", "Right"}) do local hipAttach = character[side.."UpperLeg"]:FindFirstChild("HipAttachment") or character[side.."UpperLeg"]:FindFirstChildWhichIsA("Attachment") -- Find hip attachment local origin = hipAttach and hipAttach.WorldPosition or (currentLowerTorsoCF * CFrame.new((side == "Left" and -0.7 or 0.7), -0.5, 0)).Position local result = workspace:Raycast(origin + gravityDir * 0.2, gravityDir * rayLength, raycastParams) raycastResults[side] = result if result then legState[side].GroundNormal = result.Normal legState[side].ContactPos = result.Position totalGroundNormal += result.Normal avgContactPos += result.Position groundContacts += 1 else legState[side].GroundNormal = worldUp legState[side].ContactPos = nil -- No contact end end local avgGroundNormal = (groundContacts > 0) and (totalGroundNormal / groundContacts).Unit or worldUp local avgGroundPos = (groundContacts > 0) and (avgContactPos / groundContacts) or (currentHrpCF * CFrame.new(0, -humanoid.HipHeight, 0)).Position -- === Calculate CoM and CoS === local com = getCenterOfMass() local comProjected = com - avgGroundNormal * (com - avgGroundPos):Dot(avgGroundNormal) -- Project CoM onto average ground plane local cos = Vector3.zero local stanceLegs = 0 if legState.Left.IsStance and legState.Left.ContactPos then cos += legState.Left.ContactPos stanceLegs += 1 end if legState.Right.IsStance and legState.Right.ContactPos then cos += legState.Right.ContactPos stanceLegs += 1 end if stanceLegs > 0 then cos = cos / stanceLegs else -- If no stance leg has contact, estimate CoS below CoM cos = comProjected end -- === Torso and Head Control === local torsoAlign = constraints[upperTorso:GetFullName() .. "TorsoAlign"] if torsoAlign then local targetTorsoUp = avgGroundNormal local targetTorsoLook = (currentHrpCF.LookVector - targetTorsoUp * currentHrpCF.LookVector:Dot(targetTorsoUp)).Unit if targetTorsoLook.Magnitude < 0.1 then targetTorsoLook = -currentTorsoCF.LookVector end -- Fallback if look vector is aligned with up vector local targetTorsoRight = targetTorsoLook:Cross(targetTorsoUp).Unit -- Calculate lean based on CoM offset from CoS local offset = comProjected - cos local leanAxis = offset.Magnitude > 0.01 and targetTorsoUp:Cross(offset.Unit) or targetTorsoRight local leanAngle = math.clamp(offset.Magnitude * BALANCE_ADJUST_SPEED * 0.1, -MAX_LEAN_ANGLE, MAX_LEAN_ANGLE) local leanRotation = CFrame.fromAxisAngle(leanAxis, -leanAngle) -- Lean opposite to offset local baseTargetCF = CFrame.fromMatrix(currentTorsoCF.Position, targetTorsoRight, targetTorsoUp, -targetTorsoLook) local targetCF = baseTargetCF * leanRotation -- Smooth the target CFrame lastTargetTorsoCF = smoothCFrame(lastTargetTorsoCF, targetCF, dt, SMOOTH_FACTOR * balanceMultiplier) torsoAlign.CFrame = lastTargetTorsoCF torsoAlign.Responsiveness = TORSO_RESPONSIVENESS * balanceMultiplier torsoAlign.MaxTorque = TORSO_MAX_TORQUE * balanceMultiplier end local headAlign = constraints[head:GetFullName() .. "HeadAlign"] if headAlign then -- Keep head level with horizon, looking forward relative to HRP local targetHeadLook = (currentHrpCF.LookVector - worldUp * currentHrpCF.LookVector:Dot(worldUp)).Unit if targetHeadLook.Magnitude < 0.1 then targetHeadLook = -currentHrpCF.LookVector end -- Fallback local targetHeadRight = targetHeadLook:Cross(worldUp) local targetHeadCF = CFrame.fromMatrix(head.Position, targetHeadRight, worldUp, -targetHeadLook) headAlign.CFrame = targetHeadCF -- No smoothing needed? Or add if jittery headAlign.Responsiveness = HEAD_RESPONSIVENESS * balanceMultiplier headAlign.MaxTorque = HEAD_MAX_TORQUE * balanceMultiplier end -- === Leg Control Logic === local comOffsetFromCos = (comProjected - cos).Magnitude -- Determine which leg should step (if any) local stepSide = nil if comOffsetFromCos > STEP_THRESHOLD and not isFalling then -- Step with the leg furthest from the CoM projected position local distL = legState.Left.ContactPos and (comProjected - legState.Left.ContactPos).Magnitude or math.huge local distR = legState.Right.ContactPos and (comProjected - legState.Right.ContactPos).Magnitude or math.huge if legState.Left.IsStance and legState.Right.IsStance then stepSide = (distL > distR) and "Left" or "Right" elseif legState.Left.IsStance then stepSide = "Right" -- If only left is stance, step with right elseif legState.Right.IsStance then stepSide = "Left" -- If only right is stance, step with left end -- If a step is decided, mark the other leg as stance if stepSide then local stanceSide = (stepSide == "Left") and "Right" or "Left" legState[stepSide].IsStance = false legState[stanceSide].IsStance = true -- Reset target pos for the new swing leg legState[stepSide].TargetPos = nil end elseif groundContacts < 2 and not isFalling then -- If one foot lost contact unexpectedly, try to step with it if not legState.Left.ContactPos and legState.Right.IsStance then stepSide = "Left" legState.Left.IsStance = false elseif not legState.Right.ContactPos and legState.Left.IsStance then stepSide = "Right" legState.Right.IsStance = false end if stepSide then legState[stepSide].TargetPos = nil end end -- Update each leg for _, side in pairs({"Left", "Right"}) do local upperLeg = character:FindFirstChild(side.."UpperLeg") local lowerLeg = character:FindFirstChild(side.."LowerLeg") local foot = character:FindFirstChild(side.."Foot") if not upperLeg or not lowerLeg or not foot then continue end local upperLegAlign = constraints[upperLeg:GetFullName() .. side.."UpperLegAlign"] local lowerLegAlign = constraints[lowerLeg:GetFullName() .. side.."LowerLegAlign"] local footAlign = constraints[foot:GetFullName() .. side.."FootAlign"] local footForce = constraints[foot:GetFullName() .. side.."FootForce"] if not upperLegAlign or not lowerLegAlign or not footAlign or not footForce then continue end local hipPos = (currentLowerTorsoCF * CFrame.new((side == "Left" and -0.5 or 0.5), -0.1, 0)).Position -- Approx hip pos if legState[side].IsStance then -- === Stance Leg Logic === local targetFootPos = legState[side].ContactPos or (hipPos + gravityDir * humanoid.HipHeight) -- Target ground or estimate below hip -- Target Foot Orientation: Align with ground normal, point forward local footTargetLook = (torsoLook - legState[side].GroundNormal * torsoLook:Dot(legState[side].GroundNormal)).Unit if footTargetLook.Magnitude < 0.1 then footTargetLook = torsoRight * (side == "Left" and -1 or 1) end -- Fallback local footTargetRight = footTargetLook:Cross(legState[side].GroundNormal) local targetFootCF = CFrame.fromMatrix(foot.Position, footTargetRight, legState[side].GroundNormal, -footTargetLook) footAlign.CFrame = targetFootCF -- Target Leg Orientation (IK-like): Point knee towards look direction, connect hip to foot local legVector = (targetFootPos - hipPos) local legDir = legVector.Unit local legLength = legVector.Magnitude local desiredKneeBendAxis = torsoRight * (side == "Left" and -1 or 1) -- Bend knee outwards slightly -- Simple 2-joint IK approximation (Placeholder - Needs better IK solution for accurate bending) local upperLegTargetLook = (lowerLeg.Position - upperLeg.Position).Unit local lowerLegTargetLook = (targetFootPos - lowerLeg.Position).Unit local upperLegTargetUp = desiredKneeBendAxis:Cross(upperLegTargetLook).Unit local upperLegTargetCF = CFrame.lookAt(upperLeg.Position, upperLeg.Position + upperLegTargetLook, upperLegTargetUp) local lowerLegTargetUp = desiredKneeBendAxis:Cross(lowerLegTargetLook).Unit local lowerLegTargetCF = CFrame.lookAt(lowerLeg.Position, lowerLeg.Position + lowerLegTargetLook, lowerLegTargetUp) -- Apply orientations (Consider adding smoothing if jittery) upperLegAlign.CFrame = upperLegTargetCF lowerLegAlign.CFrame = lowerLegTargetCF -- Apply downward force footForce.Force = legState[side].GroundNormal * -FOOT_FORCE_MAGNITUDE * balanceMultiplier footForce.Enabled = true -- If the other leg just finished stepping, become stance local otherSide = (side == "Left") and "Right" or "Left" if not legState[otherSide].IsStance and legState[side].ContactPos then -- Check if swing foot is close enough to target local swingFoot = character[otherSide.."Foot"] if swingFoot and legState[otherSide].TargetPos and (swingFoot.Position - legState[otherSide].TargetPos).Magnitude < 0.5 then legState[otherSide].IsStance = true -- Allow swing leg to become stance end end else -- === Swing Leg Logic === if not legState[side].TargetPos then -- Calculate a new step target position local stepDirection = (comProjected - cos).Unit -- Step direction based on imbalance if stepDirection.Magnitude < 0.1 then stepDirection = torsoLook end -- Fallback if no offset local stepLength = math.clamp(comOffsetFromCos, 0.5, 2.0) -- Step length based on imbalance magnitude local lateralOffset = torsoRight * FOOT_PLACEMENT_OFFSET * (side == "Left" and -1 or 1) local targetPosOnGround = cos + stepDirection * stepLength + lateralOffset -- Raycast down from target to find actual ground position local groundCheckRay = workspace:Raycast(targetPosOnGround + worldUp * 1, gravityDir * (1 + STEP_HEIGHT * 2), raycastParams) legState[side].TargetPos = groundCheckRay and groundCheckRay.Position or targetPosOnGround end -- Move foot towards target using interpolation + lift local currentFootPos = foot.Position local targetPos = legState[side].TargetPos local vectorToTarget = targetPos - currentFootPos local distanceToTarget = vectorToTarget.Magnitude -- Add step height (arc motion) local totalDist = (targetPos - hipPos).Magnitude -- Approx total distance from hip local currentDistFromHip = (currentFootPos - hipPos).Magnitude local progress = math.clamp(1 - (distanceToTarget / (totalDist + 0.1)), 0, 1) -- Estimate progress 0 -> 1 local lift = math.sin(progress * math.pi) * STEP_HEIGHT -- Sine curve for lift local desiredFootPos = currentFootPos:Lerp(targetPos, dt * STEP_SPEED_FACTOR) + worldUp * lift -- Use AlignPosition (or VectorForce) to move the foot - Simpler: just set AlignOrientation targets -- For simplicity here, we'll just orient the leg towards the lifted target position local legVector = (desiredFootPos - hipPos).Unit local desiredKneeBendAxis = torsoRight * (side == "Left" and -1 or 1) local upperLegTargetUp = desiredKneeBendAxis:Cross(legVector).Unit local upperLegTargetCF = CFrame.lookAt(upperLeg.Position, upperLeg.Position + legVector, upperLegTargetUp) local lowerLegTargetUp = upperLegTargetUp local lowerLegTargetCF = CFrame.lookAt(lowerLeg.Position, desiredFootPos, lowerLegTargetUp) -- Keep foot relatively level during swing local footTargetLook = (torsoLook - worldUp * torsoLook:Dot(worldUp)).Unit if footTargetLook.Magnitude < 0.1 then footTargetLook = torsoRight * (side == "Left" and -1 or 1) end -- Fallback local footTargetRight = footTargetLook:Cross(worldUp) local targetFootCF = CFrame.fromMatrix(foot.Position, footTargetRight, worldUp, -footTargetLook) upperLegAlign.CFrame = upperLegTargetCF lowerLegAlign.CFrame = lowerLegTargetCF footAlign.CFrame = targetFootCF -- Disable downward force during swing footForce.Enabled = false -- Check if step is complete if distanceToTarget < 0.3 and lift < 0.1 then legState[side].IsStance = true -- Become stance leg legState[side].TargetPos = nil -- Clear target end end -- Apply balance multiplier to limb constraints upperLegAlign.Responsiveness = LIMB_RESPONSIVENESS * balanceMultiplier lowerLegAlign.Responsiveness = LIMB_RESPONSIVENESS * balanceMultiplier footAlign.Responsiveness = FOOT_RESPONSIVENESS * balanceMultiplier upperLegAlign.MaxTorque = LIMB_MAX_TORQUE * balanceMultiplier lowerLegAlign.MaxTorque = LIMB_MAX_TORQUE * balanceMultiplier footAlign.MaxTorque = FOOT_MAX_TORQUE * balanceMultiplier footForce.MaxForce = FOOT_FORCE_MAGNITUDE * 5 * balanceMultiplier -- Allow strong force application end -- === Arm Control (Simple resting pose) === for _, side in pairs({"Left", "Right"}) do local upperArm = character:FindFirstChild(side .. "UpperArm") local lowerArm = character:FindFirstChild(side .. "LowerArm") if not upperArm or not lowerArm then continue end local upperArmAlign = constraints[upperArm:GetFullName() .. side.."UpperArmAlign"] local lowerArmAlign = constraints[lowerArm:GetFullName() .. side.."LowerArmAlign"] if not upperArmAlign or not lowerArmAlign then continue end local sideDir = torsoRight * (side == "Left" and -1 or 1) local downDir = -torsoUp local forwardDir = torsoLook -- Target slightly down and to the side/slightly back local upperArmTargetLook = (downDir * 0.8 + sideDir * 0.1 - forwardDir * 0.2).Unit local upperArmTargetUp = sideDir:Cross(upperArmTargetLook).Unit local targetUpperArmCF = CFrame.lookAt(upperArm.Position, upperArm.Position + upperArmTargetLook, upperArmTargetUp) local lowerArmTargetLook = (downDir * 0.7 + sideDir * 0.05 - forwardDir * 0.4).Unit local lowerArmTargetUp = sideDir:Cross(lowerArmTargetLook).Unit local targetLowerArmCF = CFrame.lookAt(lowerArm.Position, lowerArm.Position + lowerArmTargetLook, lowerArmTargetUp) upperArmAlign.CFrame = targetUpperArmCF lowerArmAlign.CFrame = targetLowerArmCF upperArmAlign.Responsiveness = LIMB_RESPONSIVENESS * 0.5 * balanceMultiplier -- Arms less rigid lowerArmAlign.Responsiveness = LIMB_RESPONSIVENESS * 0.5 * balanceMultiplier upperArmAlign.MaxTorque = LIMB_MAX_TORQUE * 0.5 * balanceMultiplier lowerArmAlign.MaxTorque = LIMB_MAX_TORQUE * 0.5 * balanceMultiplier end end) -- End Heartbeat Connect end -- End startBalancing -- Function to convert the character to a ragdoll local function makeRagdoll() if isRagdolled then return end isRagdolled = true originalJoints = {} -- Clear previous joint data -- Make parts collidable (except HRP) and set physics properties for _, child in pairs(character:GetChildren()) do if child:IsA("BasePart") then local part = child :: BasePart part.CanCollide = (part ~= hrp) -- Get current properties or use defaults local currentDensity = 0.7 -- Default density (like Plastic) local currentFriction = 0.8 -- Target friction local currentElasticity = 0.5 -- Default elasticity local currentFrictionWeight = 1 -- Default friction weight local currentElasticityWeight = 1 -- Default elasticity weight if part.CustomPhysicalProperties then -- If custom properties exist, use its density currentDensity = part.CustomPhysicalProperties.Density -- Optionally preserve other existing custom values if desired -- currentFriction = part.CustomPhysicalProperties.Friction -- currentElasticity = part.CustomPhysicalProperties.Elasticity -- currentFrictionWeight = part.CustomPhysicalProperties.FrictionWeight -- currentElasticityWeight = part.CustomPhysicalProperties.ElasticityWeight else -- Use part's base properties if no custom ones are set currentElasticity = part.Elasticity currentFrictionWeight = part.FrictionWeight currentElasticityWeight = part.ElasticityWeight end -- Set new physical properties with desired friction part.CustomPhysicalProperties = PhysicalProperties.new( currentDensity, currentFriction, -- Set desired friction currentElasticity, currentFrictionWeight, currentElasticityWeight ) end end -- Replace Motor6Ds with BallSocketConstraints for _, joint in pairs(character:GetDescendants()) do if joint:IsA("Motor6D") then local part0 = joint.Part0 local part1 = joint.Part1 if part0 and part1 then -- Store original joint info for restoration local jointInfo = { Name = joint.Name, Parent = joint.Parent, Part0 = part0, Part1 = part1, C0 = joint.C0, C1 = joint.C1 } table.insert(originalJoints, jointInfo) -- Create BallSocketConstraint local socket = Instance.new("BallSocketConstraint") local a1 = getAttachment(part0, joint.Name .. "Attach0", joint.C0) local a2 = getAttachment(part1, joint.Name .. "Attach1", joint.C1) socket.Attachment0 = a1 socket.Attachment1 = a2 socket.LimitsEnabled = true socket.TwistLimitsEnabled = true -- Set some reasonable limits (can be tuned per joint later) socket.UpperAngle = 45 socket.TwistLowerAngle = -45 socket.TwistUpperAngle = 45 socket.Parent = part0 -- Parent to one of the parts -- Store constraint using a unique key based on its intended joint name and parent local constraintKey = (joint.Parent and joint.Parent:GetFullName() or "UnknownParent") .. joint.Name .. "Socket" constraints[constraintKey] = socket joint:Destroy() -- Remove the Motor6D end end end humanoid:ChangeState(Enum.HumanoidStateType.Physics) startBalancing() end -- Function to reset the character from ragdoll state local function resetCharacter() if not isRagdolled then return end isRagdolled = false clearPhysics() -- Remove all balancing constraints and attachments -- Restore Motor6Ds local createdMotors = {} for _, jointInfo in pairs(originalJoints) do local motorKey = (jointInfo.Parent and jointInfo.Parent:GetFullName() or "UnknownParent") .. jointInfo.Name -- Ensure parts still exist before trying to create motor if jointInfo.Part0 and jointInfo.Part0.Parent and jointInfo.Part1 and jointInfo.Part1.Parent and jointInfo.Parent and not createdMotors[motorKey] then -- Check if motor already exists (e.g. from character respawn or partial reset) if not jointInfo.Parent:FindFirstChild(jointInfo.Name) then local motor = Instance.new("Motor6D") motor.Name = jointInfo.Name motor.Part0 = jointInfo.Part0 motor.Part1 = jointInfo.Part1 motor.C0 = jointInfo.C0 motor.C1 = jointInfo.C1 motor.Parent = jointInfo.Parent createdMotors[motorKey] = true end end end originalJoints = {} -- Clear stored data -- Reset part collisions and properties for _, child in pairs(character:GetChildren()) do if child:IsA("BasePart") then local part = child :: BasePart part.CanCollide = false -- Default character collision state part.CustomPhysicalProperties = nil -- Reset physics properties end end if hrp then hrp.CanCollide = false end -- Ensure HRP is non-collidable -- Attempt to reset humanoid state humanoid:ChangeState(Enum.HumanoidStateType.GettingUp) task.wait(0.1) -- Give it a moment if humanoid:GetState() ~= Enum.HumanoidStateType.Dead then -- Try setting platform stand briefly to force physics reset humanoid.PlatformStand = true task.wait(0.05) humanoid.PlatformStand = false task.wait(0.1) -- Set to a moving state if not dead if humanoid:GetState() ~= Enum.HumanoidStateType.Dead then humanoid:ChangeState(Enum.HumanoidStateType.Running) humanoid:Move(Vector3.zero) -- Ensure walkspeed applies correctly end end end -- Connect death event to trigger ragdoll humanoid.Died:Connect(function() task.wait(0.1) -- Short delay after death if not isRagdolled then makeRagdoll() end end) -- Key press detection for toggling ragdoll (R) and resetting (Y) userInputService.InputBegan:Connect(function(input, gameProcessed) if gameProcessed then return end if input.UserInputType == Enum.UserInputType.Keyboard then if input.KeyCode == Enum.KeyCode.R then if isRagdolled then resetCharacter() else makeRagdoll() end elseif input.KeyCode == Enum.KeyCode.Y then -- Force reset even if not currently ragdolled (useful if stuck) resetCharacter() end end end) -- Initial state setup (optional - start ragdolled?) -- makeRagdoll() -- Uncomment to start ragdolled by default -- Cleanup when script is removed or character is destroyed local function cleanup() if isRagdolled then resetCharacter() -- Attempt to clean up character state end clearPhysics() -- Ensure all constraints/attachments are gone end script.Destroying:Connect(cleanup) character.Destroying:Connect(cleanup) -- Also cleanup if character itself is destroyed print("Balancing Ragdoll Script Loaded.") This updated version correctly handles setting `CustomPhysicalProperties` by first checking if existing custom properties are set and using their density, otherwise falling back to default values before creating the new `PhysicalProperties` object. This should resolve the error you encountered.