- Not implemented, requires further design changes
Entity motion vectors are a tricky issue. In a vanilla game, each entity's moving part is stored as a ModelPart dealing with rendering that model. However, this model part is shared between entities, and as such you cannot just store velocity in it. There are further issues, however preliminary testing has been done in a separate branch.
- Currently unsupported, no plans
Mostly obsolete. This feature would tell the shader loader to duplicate the vertices used in any render using that specific program by a specific amount. GL_ARB_geometry_shader4 is a legacy version of core geometry shaders.
- Implemented poorly in Optifine, no intentions to replicate in Iris