Description

Added a new system to define shader passes:

• to avoid unnecessary variants (only one pass can be used at a time)
• to simplify pass selection for each drawable (instead of having to override a material feature set, the pass to use can be specified)
• to allow the material editor to differentiate properties that are pass-specific and feature-specific (all pass-specific properties should be shown)

This allows custom passes to expose settings through the material editor.

Updated shaders to use the new pass system.

Related Issue(s)

Fixes #543

Review Guidance

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Screenshots/GIFs

Shadow Clipping Threshold property now showing properly