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Is there a way to create a 2D gradient overlay in UE4 with blend modes?

Is there a way to create a 2D gradient overlay in UE4 with blend modes?

I created a photoshop mock up of what I’m trying to achieve and attached it to this message. The effects I want to reproduce are the two images labeled “gradient overlay” and “gradient overlay with blend mode”.

effects display 2.jpg

I’m imagining it to be similar to the vignette effect, but just starting from one side of the screen and with blend modes.

You can create gradients procedurally like so:
http://udn.epicgames.com/Three/MaterialMasks.html

The rest can probably be handled in post process.