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UV mapping from Flipbook frame

I posted a broader question in the unreal engine forums here, but a more focused question seems appropriate for answerhub.

I'm trying to create my own dithering pattern for the opacity mask of an opaque material. I also want to be able to switch between different patterns quickly (as in, frame animation).

My first test was to use a single texture, UV map it using screen-based UVs and tile it up the appropriate amount of times on U and V, and pipe it into the opacity mask. This all worked perfectly using this texture:

alt text

I then created the following sprite sheet for the individual frames of the dithering stages:

alt text

I tried using the flipbook function in my material, but the problem I keep having is that I can't adjust the UV tiling after I have sampled an individual frame of the animation. That is, I can't retrieve an individual frame of the flipbook, THEN UV map that tiling across the screen...

Any thoughts are appreciated.


Product Version: UE 4.9
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asked Sep 22 '15 at 06:02 PM in Rendering

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I'm currently having the same issue, I'm using animated tiling textures for some of my environments. If anyone knows of a solution if you post i link that would be greatly appreciated.

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answered Oct 15 '15 at 03:19 AM

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