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Wanting to use bump offset parallax combined with a refraction effect

I'm wanting to create a material like the one used in the "Showdown" demo shop windows but with an added refraction effect on the "window" that distorts the parallax background (like water droplets).

The "Showdown" demo uses Bump Offset to shift the texture(s) as your perspective changes and I've gotten that part to work just fine. However, I'm not sure what to do to the material to have droplets that further distorted the already distorted parallax background texture.

Here's an example conceptually of what I'm after...

alt text

Product Version: UE 4.9
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asked Sep 12 '15 at 09:43 AM in Rendering

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tmek
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I expanded on this question in the forums and got an answer from Legend286 which did just what I was looking for.

Take your parallax uv and add a normalmap's RG channels multiplied by a small number to it, that should do what you want without wrecking the parallax.

Here's the forum thread:

https://forums.unrealengine.com/showthread.php?84205-Wanting-to-use-bump-offset-parallax-combined-with-a-refraction-effect

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answered Sep 14 '15 at 09:30 AM

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tmek
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