Requesting improvements about planar reflections (4.12)

[anonymous_user_c94f194d]

@;599883

Nice one

There is a performance hit even with no objects in the scene but culling should definitely help at least a little bit in heavy scenes.
But keep in mind that iterating over all the objects in the scene in order to cull them out could sometimes be bad for performance (if you are cpu-bound I guess).

Isn’t the clip plane supposed to take care of that?

Iterating all static objects in compact array is super fast. Around 1000 objects in our scene cost less than 0.1ms. Renderer always do normal frustum culling, so if engine would use this optimization then it wouldn’t cost anything extra.

Clip plane will cull objects but this culling happen after vertex shader. So all objects that are rendered that are behind clip plane will still cost extra draw calls and vertex shader performance. This could be fixed by easily by replacing frustum near plane with clipping plane.