I have an error when exporting a Mesh in roblox, some parts are invisible and do not appear in roblox (Note: Double Sided is enabled)
IMAGE :
Do you mean Import into roblox? And from what program?
I am assuming you made that model in Blender… If so, then in Blender:
Select your Model > Go to Edit Mode > Press A on your Keyboard > Press Shift + N on your Keyboard.
1 Like
Are you sure those missing Faces are actually there?
Don’t make Double Sided Enabled, just make sure that the Mesh is properly set up.
If you are using Blender you can see the face orientation (Normals) as @abcanish123 said.
Just Google your issue to search for help in Blender Tutorials (or whatever 3D software you are using) since this is the Roblox Forum, not a Blender Forum.
1 Like
I’m sorry I couldn’t reply sooner, I was very busy 
So about, yes I imported into roblox and I used blender
All right, I’ll do it. Thank you for your help!