Part

The building block. A block, ball or cylinder you can size, colour and make rough, metal or glass; drop a picture on a face and it becomes a decal.

Part is Roblox's Part: Shape is Block, Ball or Cylinder, with Roblox's conventions (a cylinder runs along X, a ball's diameter is its smallest side). Its look beyond Color, Transparency included, comes from the TexturePack it points at; with none it has the plain look. An image file dropped on a Part in a viewport becomes a Decal on the face under the pointer. Size, CFrame, physics and pivots come from BasePart.

BasePartPVInstanceInstance3D

Example

Make parts from a scriptLuau
local studio = Root.Sandbox.DataModels.Studio
local function part(name, x)
	local p = Instance.new("Part")
	p.Name = name
	p.Size = Vector3.new(2, 1, 1)
	p.CFrame = CFrame.new(x, 5, 0)
	p.Parent = studio
	return p
end
local a = part("ChainA", -3)
local b = part("ChainB", 4)

Properties

NameTypeDefaultDescription
Shapestring"Block"
Block, Ball, Cylinder		Also takes an Enum.PartType item, such as Enum.PartType.Ball; reading it still gives a string.
From BasePart 29
AnchoredApplyAngularImpulseApplyImpulseApplyImpulseAtPositionAssemblyAngularVelocityAssemblyLinearVelocityAssemblyMassAssemblyRootPartCFrameCanCollideColorCustomPhysicalPropertiesEmissionGetMassGetPivotIORMasslessMaterialMetallicOrientationPivotOffsetPivotToPositionRoughnessSizeTexturePackTransmissionTransparencyWorldCFrame
From Instance 22
ClassNameCloneDestroyFindFirstAncestorFindFirstAncestorOfClassFindFirstAncestorWhichIsAFindFirstChildFindFirstChildOfClassFindFirstChildWhichIsAGetAttributeGetAttributesGetChildrenGetDescendantsGetFullNameInstanceHiddenIsAIsAncestorOfIsDescendantOfNameParentSetAttributeWaitForChild