With only one LOD, I can use Generate Unique UVs tool to make my second UV set. As soon as I import more LODs, I can still use the tool, but the Coordinate Index refuses to change. It’s stuck with 0 and there’s nothing I can do.
Hey Tin,
Is this on a static mesh and how are you importing more LODs for it? Thank you.
Best Regards,
Ryan
Yes, it’s static mesh. I created LODs in Maya and imported them via FBX pipeline. Originally, my model didn’t have second UV set, so I used Editor tool to generate one and the bug occurred.
Okay, I have the answer by myself :P. Every single LOD needs its own lightmap. One of my LOD was a billboard and it didn’t have lightmap. I’m just curious that why UDK doesn’t require this to work.
I realize this is an old post, but I just had this issue myself. It turns out that not all of the LOD’s had a lightmap UV. I needed to check generate lightmap on ALL of the LODs to fix it.