Improve: Reduce the materials. Too many effect materials are exist.

[mob-sakai]

Too many effect materials are exist.
Therefore, we generate effect materials as sub-asset.

[mob-sakai]

Check build size

[mob-sakai]

OK, unused shader variants and materials are excluded from build.

[mob-sakai]

UI-Effect material include 112 effect material variants as sub-asset.

UI-Effect
├ UI-Effect_Add
├ UI-Effect_Add_Fast
...
└ UI-Effect_Pixel_Sub_Medium

Sub-asset materials are hidden in project view & object picker window.
Apparently, the displayed materials became very few.
This is a great result :)
Of course, unused shader variants and materials are excluded from build.

Version	UI-Effect.shader	UI-EffectCapture.shader	Materials
main-asset (ver.1.4-)	121KB	14.9KB	about 7.0KB
sub-asset (ver.2.0-)	119KB	14.9KB	6.8KB

[mob-sakai]

OMG.
All sub-assets are included in asset bundle.

[mob-sakai]

• prefab_1~4 contains UIEffect with UI-Effect_Sepia_Set_Fast material.
  • Asset bundle name is prefab_1~4
• Asset bundle shared_0 contains following shared asset.
  • Material UI-Effect_Sepia_Set_Fast
  • Shader UI-Effect
  • Small texture Unity-chan
• Load LZ4 compressed asset bundles, load asset and instantiate prefab in a frame (not async).

[mob-sakai]

Test on android (5 times average).
In ver.2.0, first loading is too late...

Version	Build size (LZ4)	Instantiate (first)	Instantiate (later)
main-asset (ver.1.4-)	28KB	32.99ms, 10.1KB	5.73ms, 8.2KB
sub-asset (ver.2.0-)	340KB	153.14ms, 10.1KB	5.96ms, 8.2KB

[mob-sakai]

hmm...
Use ScriptableObject for material container. -> NG.

[mob-sakai]

OK.
Let's fix the default to sub-asset mode and switch it to main-asset mode.

[mob-sakai]

Sub-asset mode (ver.2.0 default)

• Compact.
• UI-Effect material include 112 effect material variants as sub-asset.
• Sub-asset materials are hidden in project view & object picker window, and only UI-Effect material is displayed.
• Unused shader variants and materials will be excluded from build, but they will be included in AssetBundle.

UI-Effect
├ UI-Effect_Add (Hidden)
├ UI-Effect_Add_Fast (Hidden)
...
└ UI-Effect_Pixel_Sub_Medium (Hidden)

Main-asset mode (ver.2.0 optional)

• If necessary, generate effect material as asset.
• All generated materials are displayed in project view & object picker window.
• Unused shader variants and materials will be excluded from build and AssetBundle.
• We recommend this mode only when "Prefabs contains UIEffect" is included in the asset bundle.

[mob-sakai]

How to switch mode

I have 2 ideas.

1. Is Generated/Generated_UI-Effect_*** material exist?
   • To Main-asset mode: Generate Generated/Generated_UI-Effect_*** material.
   • To Sub-asset mode: Delete Generated/Generated_UI-Effect_*** material.
2. Using script define symbol
   • ASSETBUNDLE_UI_EFFECT