Tessellation And Instancing
When an mesh is instanced in Redshift, adaptive tessellation is no longer supported. However, you can still use fixed-rate tessellation (and, subsequently, displacement too).
To do fixed-rate tessellation you need to:
- Disable screen-space adaptive tessellation
- Set maximum edge legth to zero
- Set the maximum to something reasonable
Please pay particular attention to the third point above, as the default setting (6 subdivisions) is too high for fixed rate subdivision. As explained above, 6 means 4096 primitives will be generated for each original primitive. So a mesh with just 1000 faces will turn into a mesh with 4 million faces!
Out Of Frustum Tessellation