Fixed parallax, atmosphere, and skysphere issues with ortho camera

[adriengivry]

Description

A bunch of issues were occurring with the orthographic camera. This PR fixes those issues.

• Added an option to Material (exposed through the material editor) to skip rendering a material if it isn't supported by a given projection mode (perspective/orthographic).
  • This is now used to skip atmosphere & skysphere rendering when using an orthographic camera
  • Of course if the user is making a 2D game, they'd be better off removing the atmosphere/skysphere actors, but this is useful when switching between modes regularly.
• Parallax mapping is now forced OFF during the shadow pass.
• Parallax edge clipping is now disabled when using an orthographic camera.

Related Issue(s)

Fixes #524

Review Guidance

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Screenshots/GIFs

OvEditor_es9tIwVcUc.mp4