Transform morph targets, skinned mesh in shaders

[gkjohnson]

Render positions, UVs, colors, tangents, normals to MRT and read them back.

[gkjohnson]

Can the transformed attributes be arbitrary? Or only support what three.js supports in shaders for morph targets, etc. Only the critical / commonly changing fields are updated and written out while the rest are static in the geometry buffer.

[gkjohnson]

Multiple geometries can be rendered at once with offsets so full scenes can be generated. Perhaps this can just be called "GPUStaticGeometryGenerator"