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Why is unreal adding pixels?

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Hello! I was wondering about why unreal 4 adds pixels (between the red lines) they are not there in the file itself and every texture that I tested on this appears? I tried make my own texture but did not work? I have mip maps off and shapren 10 but will not work?

Product Version: UE 4.10
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asked Mar 18 '16 at 02:40 PM in Rendering

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Hi :) First thing is this your model? Have you created light maps for it? Usually these lines appear when straight edged uv islands fall between the uv edges in the uv space (the grid lines). You can sort this by snapping the edges of your uv islands to the uv space grid edges. These lines can also be caused by there not being enough padding between your uvs in the uv space. This causes bleed - the lines you're seeing.

If this is the issue read point 6. http://www.worldofleveldesign.com/categories/udk/udk-lightmaps-01-basics-and-important-principles-for-creating-using-lightmaps.php

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answered Mar 18 '16 at 02:55 PM

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avatar image Lathost Mar 18 '16 at 03:55 PM

thanks for the answer, but I have it snapped to the uv space edges. so to fix this I need to not have them there?

avatar image ergoproxy Mar 18 '16 at 05:14 PM

Nope that is correct. I'm guessing this is your light map you're talking about and not your texture uvs. Are you able to post a screenshot of your lightmap uv? Is there enough spacing between the islands? 2px is recommended.

avatar image Lathost Mar 18 '16 at 05:20 PM

Oh okej, so lightmaps are importent even when I am not using static lightning?

avatar image ergoproxy Mar 18 '16 at 05:22 PM

They aren't needed for none static lighting - but they do stop those errors that you are seeing. By creating lightmaps - and setting the model to static you can create better shadows and reduce errors.

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