What game engine are you going to use these models?
RPG Maker MV, I've been using lowpoly models, converting them to .obj and using them in MV3D.
Here's the thing, these files aren't being processed through MV3D right now, they are being directly examined in Blender. The first Furniture Kit has no issues like the second one does.
And the models from the first kit convert to .obj and are working just fine in MV3D.
