external lightmapping tool - 3ds max

Unity Engine
1

I am trying to use the external lightmapping tool.

when i apply ‘unwrap uv’ in 3ds max, the uvw mapping disappers. is there any way to keep this?

2

can you please be more specific about the issue? When modifier is on top of object you select all the faces and open edit UV window. From there i usually use use automatic flat UV. It usually does the job well if the model is simple.

3

sorry, i should have posted that i have sorted this now. i just didnt select a different map channel.

thanks