Image Update: HISM Distance Culling

Scenery in《Drifting》

HISM Distance Culling

In a previous post, I talked about how the distance fade shader causes the draw call for my scene increases dramatically and I need to find a way to disable actors - or more specifically HISM actors - when it's far away from the player camera. (see this video to learn more about HISM in UE4) 

I've tried cull distance volume, however, after some research and testing I found out it's not applicable to moveable actors (including HISM). I dived into the UE4 source code and discovered there are already variables for HISM distance culling - StartCullDistance and EndCullDistance. The variables did what its name suggested and after some modification for my HISM actor class, I am able to reduce an average of 2 ms to the draw call for my scene which is a pretty huge performance improvement.

As I keep developing the project, optimization issue will always be on the top of my worklist. It is a process that requires the developer's constant attention and awareness of the potential performance cost of new features that are about to add to the game.

I hope you enjoy this week's update, have a relaxing weekend. （●′∀‵）ノ♡