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TexCreate_FastVRAM와 TexCreate_Transient이 뭔가요?

FSceneRenderer::RenderDistortionES2() 코드 중
궂이 "SceneColorMobile" RT 대신 "SceneColorDistorted" RT를 새로 생성하는 부분이
이해가 되지 않아서 차이점을 살펴 봤더니,
"Desc.Flags &= ~(TexCreate_FastVRAM | TexCreate_Transient); "
이게 유일한 차이점으로 보였습니다.

그래서 아래 2가지가 궁금합니다.
1. TexCreate_FastVRAM와 TexCreate_Transient는 무슨 기능을 수행하기 위해 존재하는 Flag인가요?
2. 현재 FatVRAM 관련 기능은 동작하지 않도록 구현되어 있는 것 같던데, 궂이 "SceneColorDistorted" RT를 새로 만들어야 하나요?

답변 부탁 드립니다.

Product Version: UE 4.17
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asked Feb 02 '18 at 02:12 AM in Rendering

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