even with Unreal Studio/import CAD there are serious issues in Unreal when it comes to importing from Rhino 3D (i used V6.8 here but assume the same issues with other versions.)
I watched Epic’s video stream some days ago about Rhino and UE. So now with the Studio features we can not only import via .fbx but also use the .3ds file via the new “import CAD” feature.
Lets see if any of these ways works fine:
Here is the simple model in Rhino with UVs assigned:
Now export as .fbx and import in UE 4.20.3. The lightmap generated of UE is overlapping by 23%, as you can see from the error message after the lightbuild. Funny that UE recognises that, but there is no way to fix this in UE.
Ok, lets try the the new import CAD feature from Studio:
Here the 3 surfaces come separately as a “datasmith scene” but still errors (middle version). Now as i like to work with one model and not build collisions for each surface (but just one for the whole model), i actor-merged the 3 static meshes into one (no change, same errors) and tested different settings for recompute normals and so on. Still does not solve the error, just result in different errors: see version to the right:
Even when the generated lightmap in UE seems kind of OK and reports no errors after lightbuild for the import-CAD versions, there are some serious errors as you can see here:
Now I really dont know how to search for the error. Playing with all the variables on export and import seems like a waste of time. Is there any way to track down the issue?
Enclosed are the files.