Hello, I have a 3D house in .stl made with SketchUp. My goal is to import it in Unreal Engine 4 in .fbx in order to create a decor. When I make the conversion with Blender, the model is perfect but unfortunately when I import it in UE4 the model is broken, walls and other parts are missing. Some 3D softwares display the 3D model without errors and others do. Have you ever experienced this problem or do you have any idea where the problem lies?
Thank you in advance for your answer,
Hey there @BABAL! Welcome to the community! There’s a number of things that could cause this, the most common is normals being non-conforming. Unreal by default culls backfaces, ie you will never see the back of a polygon. This can make parts or all of meshes with reversed normals invisible. Here I have a tutorial that can help you identify where that is and how to fix them (in blender):
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If that’s not the case, it could be your blender export settings or your unreal import settings. Double check the FBX was exported properly as well. I can’t count the number of times in Blender I forgot to check all of an object and not just selected meshes at 4am at night. If it’s all meant to be one piece, verify it is all joined before bringing it into unreal, as otherwise unreal will unpack it into multiple pieces and break it’s form up.
Hello @SupportiveEntity, thank you for your quick answer ! Indeed, the problem was indeed with the backfaces. I followed the correction video on Blender and the model generates perfectly in UE4 !
Thanks again for your help !