When I make a Boolean subtract operation and then trying to texture that model I get an overlapping. So I always do an “only unchanged polygons” option but sometimes this leads to crap looking wireframes but just today I figure it out that I can get this done by simply adding a PolySplit to the other end of object and I thought “Why didn't Houdini has this already” it sure does but only from one side and theoretically this can't do a hole inside a object.

Could you post a HIP file showing the issue?