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Some testing of Raytraced shadows and AO

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    Some testing of Raytraced shadows and AO

    I only have a 1080 TI, so I wanted to see what could be achieved with as little RT stuff as possible. Here are what I ended up with so far.
    I'm quite pleased with the results by just using Ray traced shadows for the sun, and ray traced AO on the post process volume. I also like the trick of using a skylight but turning of shadows for it.

    Before/after images. (You can switch between Off, Shadows and Shadows+AO)Some notes/settings
    • r.RayTracing.Reflections is on by default. Disable it if you're not using it. (It took quite a bit of fps while doing nothing in my scene)
    • I enabled r.RayTracing.Shadows and r.RayTracing.AmbientOcclusion
    • On the skylight i turned off "Cast Shadows" (I let the post process RT AO handle it)
    • For this scene I set the Post process volume Ambient Occlusion intensity to 1 and samples per pixels to 3.
    • Since Ray tracing is mostly a per-pixel-cost, you get nice results "at any distance" like in this picture:

    Some comparisons of default and RT shadows and AO:

    If you like the smoother edges of CSM shadows you can adjust the Source Angle of RT shadows to make them softer: