1.5.0

• Added support for custom light sources using the light command
• Added user-defined functions/commands (previously only blocks could be defined)
• The width and/or height for exported images can now be set on a per-camera basis
• Added polygon command for more easily creating regular polygon paths
• The scene background can now be set individually for each camera
• Using position, orientation and size inside a path now works again (broken since 1.4.4)
• Using rnd command in option default expressions no longer has a knock-on effect on the sequence
• Options can now reference local constants in their default values
• Material brightness logic used in Viewer app is now part of the ShapeScript core
• Using wrapwidth or linespacing text commands inside an svgpath block now raises an error
• Fixed blank screen when scene contains empty camera node
• Removed StatementType.block case in favor of expression form
• Fixed some bugs in path generation relating to point colors
• The OSColor typealias is now private
• Added SVGPath dependency