My coworker posted about an issue we were having last week but it got flagged as spam and deleted so i’m going to ask the question again…
Our office started using datasmith back in the fall and we’ve been pretty happy with the results. We just started a new project and this is the first project we’re working on in unreal since updating everything to “unreal studio”. I ran into a pretty big problem though with the importing of all the geometry from max- a lot of objects have a screwed up lightmap that was generated in the import process. When I check the uv map of the asset everything looks correct but some of the polygons will display a random solid color (sometimes white, sometimes grey, sometimes black) after the lighting has been built. The normals are all correct and I put a reset xform on all objects before exporting from max. To fix this issue I just unwrap the object myself and reimport it and then assign my map channel to be used for the lightmap.
I’ve noticed this problem previously too when we were using datasmith but it would happen to maybe one or two assets in a project, where as this time its happened to a huge number of them and it would be very time consuming to go through and unwrap each one myself…it would kind of defeat the purpose of using unreal studio.
Does anyone know what might be causing this? I’m attaching screenshots of the issue and my current solution.
I’ve downloaded preview 3 of 4.20 and unfortunately I’m still having the same issues. I even started a new project and imported a new datasmith export and the same issue keeps popping up all over the place. I have a couple more details about it that may help figure out what it is-
When I reimported into the updated unreal file (4.20 preview 3) a lot of the objects that initially had a lightmap problem worked fine, but a whole new array of objects that were previously fine now have the issue.
At one point I auto unwrapped everything in max using the steam roller script and reimported the whole datasmith scene file, I think did a bulk edit on all the assets and changed their light map coordinate index to 0. Then I wanted to show one of my coworkers the original issue I’ve been having so I later changed them all back to channel 2 using the bulk edit matrix again and when I built the lighting all the issues were gone with the exception of 2 or 3 assets. But later as I made changes I had to reimport the datasmith scene file and all the problems came back in the same place.
Again, when I open the asset and look at the unwrap that unreal studio created, it always looks perfectly fine
I’ve also tested turning off the high precision normals in the asset window to match the screen shot you posted and that didn’t do anything
I’m using max2018 if that helps at all in pinpointing what might be happening
I’ve attached more screen shots of different objects where the issue is obvious.
so i’m going to ask the question again…