Apply Post Effect to only part of the screen

Does anyone know how to apply a post effect to part of the screen - the bottom half for example? Can you scale the post effect like a screen image?

Update: I was able to do it by creating a Screen Crop Texture and then applying that to a Screen Image that could then be scaled!

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I usually use SDF Rect for this. Pack it into the alpha channel and that’s your mask! Then use a normal blend with the camera texture.

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