Antialiasing for a specific scene/object

Development Rendering
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1

Hey all,

I am working on a scene in my game that only that scene results in some aliasing issues:

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image1434×1025 192 KB

(using point lights as well)

The rest of the project is fine, so I wouldn’t up the AA settings overall, is there a method to overcome this issue in the specific look?

Thanks a lot

2

Could you clarify what you don’t like about the scene? Are you referring to the sharp light spots?

3

Yes, the sharp edges on the metal truss + shiny points

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image1474×904 127 KB

4

If you change the material of the sign, and set the roughness to 1 does that solve it?

5

It helps a bit, but not fully, still getting the sharp edges

6

I think you might want to rethink the light setup and modify the post processing to normalize the values. Perhaps the spotlights you are using are set to an extreme value.

Hopefully someone else can chime in on the subject! :slight_smile:

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7

Increasing the render resolution can reduce the need for AA, but unfortunately AA is applied at a screen level, it can only apply uniformly.
Also, increasing the thickness of the aliasing object can help, as the aliasing is mostly due to the specular highlight being less than a pixel thick. This is also why increasing roughness helps - because it widens the specular highlight.
Any details that are smaller than a pixel are prone to aliasing and other artifacts, so you can only either increase the pixels to get more detail, increase the size of the detail/decrease the amount of detail so that details are larger than a pixel, or utilize AA.

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