Frame Graph Implementation

[Popov72]

Here are a number of things that are still to be implemented to work with frame graphs.
This list is not ranked in order of importance; some items are more important than others, and some will likely be postponed until a request is made, as they are not a priority:

• geometry renderer task:
  • adds support for splat meshes
  • improves the "beauty" texture (outputTexture) (adds support for sprites, particles, bounding boxes, outline renderer)
  • handles scene.needsPreviousWorldMatrices correctly (should be true if any renderer generates the velocity / linear velocity texture)
  • allows custom geometry textures
• min/max reducer (it works with frame graphs, but we could improve it by reusing the geometry depth texture if already generated in the graph)
• IBL shadows
• Atmosphere add-on
• procedural textures (they work with frame graphs, but we could integrate them better)
• RSM gi
• fluid renderer
• History texture: being able to ping/pong the texture multiple times in the same frame
• NME with prepass texture block (https://playground.babylonjs.com/#WW65SN#17)

[github-actions]

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