Finding actors that invalidate VSM cache in Unreal Engine

Development Rendering
, ,
3

Hello,

The tool for identifying which objects are invalidating VSMs (“r.Shadow.Virtual.Cache.DrawInvalidatingBounds”) has issues in 5.4 and 5.5.

The public tracker for this bug can be found here:

https://issues.unrealengine.com/issue/UE-217513

The following functions are responsible for adding primitives to the invalidation list:

  • “FVirtualShadowMapPerLightCacheEntry::OnPrimitiveRendered(…)”
  • “FVirtualShadowMapArrayCacheManager::FShadowInvalidatingInstancesImplementation::AddInstanceRange(…)”

Please let us know if this helps.