Blender model not importing accurately into studio

This is my first time using blender to make models for Roblox. I’ve recently completed my first model, which is an simple AK-47. The problem is, the model in roblox studio is not matching the one in blender.

Blender model:

Roblox studio model:

As you can see, the top barrel is missing a couple cuts and as such looks pretty bland and weird. I don’t know why it’s doing this.

The barrel was complete long before other parts of the gun, such as the magazine, which have replicated accurately from blender to studio. I’ve used the same method of making the cuts in the barrel as the holes in the grip, which have replicated fine.

If anyone could help, that would be much appreciated.

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If you’ve got any modifiers active within Blender, make sure you apply them before exporting to Studio. Not too sure what else may be causing it to appear differently.

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All modifiers have been applied. Though on careful inspection, I have realized two things:

  1. The cuts are actually there. But the cylinder is covering them regardless.

This is on the inside of the barrel. As you can see, the indents are the cuts - it’s just that they’ve been covered up for some reason.

  1. The stock is not actually accurate either.

A face is missing for some reason, but it is fixed when I enable “Double Sided”, which I don’t want to do because I have no clue what it does.

“Double Sided” just makes it so any face can be seen from both sides. And as to why the barrel isnt replicating correctly i do not know

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The stock appearing like that may be due to flipped normals. You can check face orientation in the Viewport Overlays dropdown. For the barrel part, how does that appear in edit mode?

This is what the barrel looks like in edit mode:

Also, I do not understand what flipped normals mean, sorry. I believe I found the face orientation and it says it is “Default”:

The top barrel issue may be due to the faces. From my experience, faces using more than 4 vertices dont typically import to studio properly. If the faces on there arent quads or tris, change them to that and try again.

Sorry, I don’t understand. Are the cuts too complex for studio to handle? How would I change the faces to quads or tris?

Go into face select mode, select any faces using more than 5 vertices, right click and select “Triangulate Faces”, and “tris to quads” if you want

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Face orientation can be found here.
image
If they’re not all blue, select the faces that are red and press Alt+N to flip.

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1
2

3
normals facing the correct way

4
normals facing the incorrect way

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Alright, I have applied the changes and the stock is now accurate. Thank you very much! Hopefully the other problem can be solved as well.

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I have applied this solution, but it seemingly has no effect.

To be sure, I have triangulated the entirety of the barrel, but the studio model remains unchanged.Was I wrong to triangulate the entirety of the barrel?

very odd; mind sending over a blend or mesh file so i can try tinkering with it? just the top-barrel if you dont feel comfortable sending the whole thing

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Sure thing.

BarrelProblem.blend (777.1 KB)

Never shared a blender file before, so sorry if it doesn’t work.

fixedBarrel.blend (757.5 KB)

You had some overlapping vertices. I merged them, seems to import fine now

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I believe now I have found the solution.

Importing the barrel by itself make it replicate perfectly. However, importing it with the rest of the model did not. I don’t know the reason, but I thank you for helping me find it anyway.