Hello guys, I’ve been trying to fix this for the past few hours and I can’t figure it out. If anyone knows of this problem, please help me out a little cause I’m really struggling to fix it.
Here’s a picture:
Did you add a texture or just a base color?
Can you try to use a picture with face orientation? That may help.
It seems to me the UV Map is not set up properly.
Unless you have already done so, you’re going to have to manually work each UV Map so the texture ends up to your liking. Can you send a screenshot of your UV Editing layout?
Are they using smooth shading? If they are, then you can either select them, right click and select the “shade flat” option, or you could go to the mesh tab, click on normals and make sure the auto smooth property is set to true. Hopefully this helps! If not, then it might just be a weird uv map like @Sirian142 said.
try recalculating the outside normals
Hey Partner!
Looking at a few of your messages this type of thing can only occur with certain things when exporting assets from Roblox to Blender Roblox and other game engines, They 1 Triangulate 3D Assets. Another thing is they split the vertices from one another. A few methods you can try to fix your shading issue are one of the following.
Manual Shading can result in shading results like this If done properly,
With the 3D model selected go to “Object Data Properties” or the Green Triangle, From there in the Properties panel open the Dropdown listed as “Normals” and enable the “Auto Smooth” property. Default shading is 180 but they usually default this property at 30.
If your box is Grayed out in the “Object Data Properties” or the Green Triangle, From there open the 2nd Dropdown panel listed as “Geometry Data” and click “Clear Custom Split Normals Data”
You can then go back to the Auto Smooth property and change it
Another common issue seems to be split edges you can merge all spit edges together by going into Edit mode pressing “M” and selecting “Merge By Distance”
https://gyazo.com/cdf4fe0f7afc65321c366a6f80217186
That should hopefully fix your issue with shading 
Base color with an image texture
That seems to be doing something but it still doesnt fix the weird shading thing
It fixed my issue, Thank you so much. I’m glad you were here to help me out I would of never figured. Thank you again
