does anybody have an idea how to draw motion vectors for meshes renderd by script using Graphics.DrawMeshInstancedIndirect?
by default unity does not seem to issue any draw when it comes to motion vectors which makes DrawMeshInstancedIndirect more or less worthless in case taa is enabled.
Do you use vertex animation on these meshes?
I’m still on old HDRP version (5.13). I’ve noticed that when using DrawMeshInstanced and enabling ‘motion vectors for vertex animation’ in the material inspector, the meshes are not rendered at all (material uses HDRP Lit Master Node shader graph with dynamic vertex position input).
When the ‘motion vectors for vertex animation’ option is disabled, the mesh is rendered and dynamic vertex position is working.
Is it possible to use motion vectors for vertex animation with DrawMeshInstanced and DrawMeshInstancedIndirect at all?
yes.
it should but it is not: unity does not issue any draw call for meshes being drawn using DrawMeshInstancedIndirect.
I am facing the exact issue almost three years later. Did anyone succeed in drawing motion vectors using DrawMeshInstancedIndirect in HDRP?