This is what we really need, something that outputs an API agnostic set of render commands, (shaders, uniforms, mesh layouts etc) which auto clip themselves and

This is what we really need, something that outputs an API agnostic set of render commands, (shaders, uniforms, mesh layouts etc) which auto clip themselves and such, so they can just be integrated across various engines and renderers. Of course a better format in the first place(mentioned in another comment) would just solve this anyway