Hi! Is there an easy way of copying UVs from one channel to another for the same object? I got some objects UV mapped but the maps are for ch1 - now I'd need ch2 for lightmapping and in this case the existing UVs would do fine. So now I just need an easy way to copy the UVs to ch2. There's a bunch of these objects, so…
In max if you collapse the stack UV1 is baked into the mesh as the default UV layout for that object. Then if you apply UnwrapUVW again, change the channel to UV2 and click reset the layout for UV1 will appear in UV2. You can also save UV1, switch to UV2 and load it.
If you dont care about the stack, you can also apply the unwrap modifier on your object selection and change the map channel from 1 to to 2. If you don't "reset UWs", the uvs are just copied from channel 1 to 2. Then, just collapse, to "save" the uvs. renderhjs script is certainly a cleaner way to do it though. edit: ah FU…