3Dsmax to UDK Flipped UVW's Problem
Ive created a model in 3Dsmax 9 and am importing it into UDK (the new one) there is no real problem until i apply the normal map ive created and then i see some bad shading going on where ive flipped my UVW's in max.
here is a picture of the effect;
here is a sample of my UVW's showing that ive flipped half of them and basically repeated the same bit 8 times on this pillar;
Ive just spent around 2 hrs searching the net for info on this topic adn the best ive found is a few people illuding to the idea that Flipped UV's in UDK are a no no and perhapse i need a programmer to write me a script to re flip the normals as they are being exported from max.
Thoughts? :poly127:
here is a picture of the effect;
here is a sample of my UVW's showing that ive flipped half of them and basically repeated the same bit 8 times on this pillar;
Ive just spent around 2 hrs searching the net for info on this topic adn the best ive found is a few people illuding to the idea that Flipped UV's in UDK are a no no and perhapse i need a programmer to write me a script to re flip the normals as they are being exported from max.
Thoughts? :poly127:
Replies
I may not have mentioned earlier, i have triple checked that the seams are welded, i even welded the seam in the UVW map for good measure with no effect also.
Sometimes it also helps to merge the mirrored UVs in the light map UV set so they form a continuous shell and sometimes you need to keep them separated.
EDIT:
Here's a post with some links to a few light map UV tutorials in case you need it.
EDIT2:
Just read the part about welding the UV mirror seam, I really should read threads thoroughly before replying :poly136:. Perhaps that's the cause of the problem, I have a habit of moving my mirrored UVs over at least 1 unit in U or V for baking purposes and just leave them like that.
EDIT3 lol:
One more thing, sometimes it's baking the lights with Lightmass that causes the seams. If that's the case change the Indirect Normal Influence Boost under World Properties -> Lightmass -> Lightmass Settings from default of 0.3 to 0 and rebuild the lighting.
Unfortunately the problem was there before i welded the UVW seems together as well so im quite sure thats not the problem however moving them a touch out of line with eachother may help. I saw something about that in the UDK documentation, sounded pretty screwy to me but i guess its worth a try
UDK can create light map UV sets for you, however the results won't be as good as making them yourself in your 3D app of choice.
Peace!