Using NVidia’s Vulcan demo as inspiration, I decided to use a smaller render texture to cut down on my smoke and fire fillrate, and composite over my scene.
It does wonders for peformance, but the artifacts are pretty bad.
Here’s a screenshot:
http://www.cs.virginia.edu/~csz9v/cat/testRenders/Composite_Test1.jpg
The fire won’t be blended this way in the final product, but the smoke will be. Any pointers on how to get rid of the aliased edges? Should I be blurring the low-res composite texture, blurring the final composite, or doing something else entirely?