I’m having al little VR-Project, and i added an outline effect in post process. (like in a cartoon).
Problem is, the lines all look jagged.
I already have MSAA as anti aliasing-method selected, and it works fine, exept for the outlines.
I’m suspecting the outlines are added after the anti-aliasing.
Does anyone have a solution, on how to make anti aliasing work correctly for post process effects?
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There is a little bit of info in the docs about this:
“Temporal Anti-Aliasing or Why the GBuffer Jitters”
Temporal anti-aliasing is a unique UE4 feature that greatly improves image quality with a very moderate performance cost.
By default, a post process material is inserted in the end of the post processing graph (after tone mapper). This means you get the final LDR color after tone mapping, color grading and after the temporal anti-aliasing was applied. This is the best spot for many simple post processing effects - for performance and ease of use.
Here you can see how we used the custom depth input to visualize a silhouette around specific objects:
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Notice that the former image has no anti-aliasing on the silhouette but in motion you also would see the silhouette jittering around 1 pixel. This is because temporal anti-aliasing moves the rendering of the whole scene by a sub pixel each frame. Multiple frames together are getting combined to produce the final anti-aliased image. We can however move the material to an earlier spot in the post processing graph to fix this issue.
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Try set this to an earlier moment?
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I have a same problem. Did you fix it?
I seems, i marked this thread as solved too early.
Unfortunally Sedal45’s solution doesnt work for me.
I’m now moving on to use additional Meshes with flipped normals as outlines instead.
That method works fine, and the outlines look great, but it requires a bit more work.
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SOLUTION : Just set you post process mat to affect the render befor tonemapping (and before antialiazing)
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