View Full Version : UDK break the smoothing groups

08-23-2011, 09:56 AM
Hi, I've imported an object to UDK from 3d Max, and I've noticed that UDK breaks the geometry in 4 pieces (1st image), following the UV islands, not the smoothing groups I created in Max.

I know that UDK breaks the geometry because of the UV islands, but curiously I've seen that some of the models of Epic (image 2 and 3) doesn't seem to be affected by this..

Any ideas?

http://img405.imageshack.us/img405/2984/wheeluv.jpg (http://imageshack.us/photo/my-images/405/wheeluv.jpg/)

http://img143.imageshack.us/img143/6483/epicobject.jpg (http://imageshack.us/photo/my-images/143/epicobject.jpg/)

http://img38.imageshack.us/img38/691/epicobjectwire.jpg (http://imageshack.us/photo/my-images/38/epicobjectwire.jpg/)

Uploaded with ImageShack.us (http://imageshack.us)

08-23-2011, 10:30 AM
The epic model has it's UVs stretched across the entire UV space. This will hide the seam.

08-23-2011, 11:26 AM
Thank you! I didn't know about this trick..:)

http://img13.imageshack.us/img13/5407/wheelfixed.jpg (http://imageshack.us/photo/my-images/13/wheelfixed.jpg/)

08-23-2011, 11:40 AM
also I wouldn't worry about seams until you've created a normalmap for your model. Normalmaps can fix a bunch of things to do with smoothing.

08-23-2011, 12:31 PM
Thank you, yeah, it's better with the normal map, but still with problems with the specularity. Probably if I add another NM with some noise and some color, I could hide a little bit the seam. But I think still would need more.
Maybe I could get a better normal map? I think the polys are correct for a good baking, but maybe painting I can fix something?

http://img651.imageshack.us/img651/6066/wheelnm.jpg (http://imageshack.us/photo/my-images/651/wheelnm.jpg/)

08-23-2011, 03:26 PM
Painting on the normalmap won't necessarily fix your smoothing. A good bake will help a lot.

I would not worry so much about the unbaked smoothing of the object. It's not important if you're going to bake a normalmap.

08-24-2011, 03:56 AM
Yeah, I'll try with another bake, I think I can improve it more, I remember that I made it without cage. Anyway I think I can hide the seam with some noise in these case. Thanks for the help