issue with importing a model

[anonymous_user_02718df8]

i imported a fbx model into unreal engine 5 and some of the triangles are missing the model works seamlessly in blender and Microsoft 3d viewer #development-discussion #general
UE5-03 #answerhub

[Tuerer]

Make sure those tris don’t have inverted normals. In Blender they will look fine if you don’t use smoothing, but in UE they will be invisible.

[anonymous_user_02718df8]

how would i be able to fix this issue?

[Tuerer]

In blender, check this box:

All the faces on the model should be blue. If not, select all and press Shift+N to recalculate.
If after this some are still red, manually select them and press Alt+N → Flip

[anonymous_user_02718df8]

has to be an easier way to do this

[Tuerer]

Do you mean Select All → Shift+N doesn’t help?

[anonymous_user_02718df8]

it helps with soem of them but not all of them. thats the final porduct of shift N

[Tuerer]

So the model is bad, it happens. Take some time and fix that manually.

[anonymous_user_02718df8]

ok