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I've never seen screen space reflection use ray tracing. That seams to defeat the purpose of doing screen space reflections! At least in games, they usually j
by Sohcahtoa82 3y ago
I've never seen screen space reflection use ray tracing. That seams to defeat the purpose of doing screen space reflections!
At least in games, they usually just take the rendered image, invert it, and then show it on the reflective surface, with some optional blurring added depending on the surface. It's extremely quick, though certainly has shortcomings.
- MindSpunk 3y agoThis is ray marching, not ray tracing. Ray marching takes steps through an implicit surface, in this case the depth buffer, while ray tracing does full ray/triangle intersections. Games have been doing SSR with ray marching for a decade at least [0]. Just inverting the image would only work on perfectly flat surfaces exactly aligned with the camera. [0] https://jcgt.org/published/0003/04/04/paper.pdf https://jcgt.org/published/0003/04/04/paper.pdf
- efilife 3y agoSeems*
- Sohcahtoa82 3y agoTypo. I know the difference.