A tiny update thanks to aglitchman - Rendercam now respects the clear color settings in your game.project file.

All credit goes to BillMess for this update!

A couple updates to the transform functions, screen_to_world_2d, screen_to_world_ray, and world_to_screen:

• Add an optional 'raw' argument to have the function return separate x, y, and z coordinates instead of a vector (or vectors).
• Tweaked the code so it doesn't create unnecessary new vectors on every call.

Updated render script.

• Remove deprecated render.draw_debug2d()
• Set stencil mask.
• Fix tabs vs. spaces battle.
• Rearrange things a bit and remove some unnecessary state changes.

Based on the latest built-in render script and the model rendering
script in the render manual.