At the moment there are two main usability issues that make it hard to
recommend to enable HIP RT by default:
- Dramatically increased memory usage during BVH construction on
high poly meshes compared to BVH2 (#136174)
- This issue can be fixed by using the "balanced" HIP RT BVH, but
it requires a HIP RT update that won't make it into 4.5 (!136622)
- Many Blender and GPU driver crashes when modifying objects in the
viewport. #140763, #140738, #139013, #138043
Pull Request: https://projects.blender.org/blender/blender/pulls/140794
fe346a32ec