Oop that's what I get for copy-pasting
A member registered Jul 16, 2015 · View creator page →
Creator of
After Effects Color Fringe Plugin
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I think the vertical flip you are experiencing is due to the (0,0) pivot of your UV map being at the bottom left corner rather than the top-left. The darkness of the pixels at the bottom-left here indicate this is where your origin is and is why your image is flipped vertically due to it using OpenGL conventions(Y is Up rather than Y is Down):
OpenGL is the only graphics API that defines its texture-space like this. While DirectX/Vulkan/Metal/After-Effects/etc define the top-left corner of their texture-space as the 0,0-origin.
My unit tests have PixMap and B.Map behaving the same, except for how their scale operation works(B.Map scales about the center (0.5,0.5) while PixMap scales about the origin (0.0, 0.0). In my next update I'll can tweak the texture scaling-operation so that they both scale about the center!
The effect is working correctly, but the layer itself is scaled down to %16.7 of its original size so After Effects introduces additional filtering and averaging and sub-pixeling.
Try clicking this "/" symbol until it is stair-steppy to disable the additional filtering that After Effects introduces.
https://helpx.adobe.com/after-effects/using/layers.html#layer_image_quality_and_...
When you render it out, be sure to use "Current Settings" when exporting so it does not re-introduce that additional filtering anymore.
Another solution is to apply it to an adjustment layer rather than this scaled-down layer.
