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Unmapped texels

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I like my scenes/objects to be as clean and performant as possible Still learning UE4 (who isn't), still learning UV unwrapping

I have this pipe modelled in C4D, I think I have a clean UV map When I bring the object into UE4 , the building process takes a good while. Looking at the reasons why this is taking so long I get the results in the white box (see screenshot) ... What are all those unmapped texels ?

I have to admit - I'm getting this result after I cranked the lightmap resolution on the object upto 512 (not sure why I felt the need to do this)

When I'm putting it back to 64, I only get .2% unmapped texels.

Any help greatly appreciated.

Product Version: UE 4.10
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asked Feb 14 '16 at 11:20 PM in Rendering

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avatar image Bargelot Feb 17 '16 at 01:36 PM

The same question!

avatar image Sunchaser Feb 17 '16 at 02:27 PM

I also posted this on the Unreal Forum and got this as a response. "If you haven't changed the importer to create lightmap uv's, it will create a new set, and make that the default lightmap layer. So your nicely laid out on may not be used." Read thread here

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Probably you've solved this by now, but if not I've written about unmapped texels (and why they are so important) on my blog http://niberspace.com/blog/speed-up-ue4-lightmap-build-times/

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answered Apr 04 '18 at 09:59 PM

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