No seams in Max, seams in Unreal

alexk

Trying to get my hands dirty with making a simple box building and running into a problem. In max, my building has no seams but after import into Unreal Editor, there are seams. Heres a screenshot:



And here is the texture I am using. The bottom half is a tiling texture which is only half of the texture sheet, so I can use the top space for another tiling texture.



And here is the UV layout I have.. I've only really UV'ed the front and then ran into this problem



How do I get it so that when it's in UnrealEditor, I won't have those nasty seams?

MoP

Mip-mapping.
If you've put the top of your UV layout there at exactly half way up the UV bounds, then as soon as you mip down a level, the mid-point pixel will inherit the white from your texture at the top.

The solution is to move the top of your UV layout down a few pixels.

Also you could test this in Max by making sure mip-mapping is turned on in the viewport, display the texture and zoom out a bit - you'll see the white line kick in after you zoom out a little way.

Mark Dygert

This is why padding your UV seams is so important.

alexk

how do I turn on mip-mapping on the viewport? I'm currently using max 2010.. thanks

gamedev

MoP and Vig are right. One other thing to add - unreal saves memory by using imprecise UV's. You can toggle off this feature in the static mesh browser just under the LODInfo where you plug your materials into - its called 'Use Full Precision Uv's'. This can sometimes be the cause of unwanted seams even after you've adjusted your UV padding.

-Tyler

Mark Dygert

alexk wrote: »

how do I turn on mip-mapping on the viewport? I'm currently using max 2010.. thanks

Customize > Preferences > Viewports tab > Configure Driver > MipMap Lookup (bottom right).