Roblox Import Triangulation Problem

I imported a mesh from Roblox, originally made in blender. When I try to apply the boolean modifier in blender to the object (so I can cut a hole in it) the object’s faces contort in a strange way.

I’m not sure why this is, or how to fix it. Attached below are pictures before and after I try to cut the hole in the object.

Help would be greatly appreciated.

This is before applying any modifier

This is after applying the boolean modifier (trying to cut a hole in the object)

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I have experienced this problem many times.

Did you triangulate prior to importing into Roblox?

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Yes, I triangulated them before importing them.

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It looks like using that modifier makes the mesh use smooth shading. Select all of its faces then press F3 and type “shade flat”.

Doing this might give your model the “weird low-poly simulator shading” style, though. I forget what I did on my own meshes to maintain smooth shading while also allowing for sharp edges, but I believe it was the “auto smooth” property. Enable this and adjust the angle beside the checkbox until your model’s shading looks correct.
image

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As said, change to Smooth Flat for those faces in Edit Mode.
Also in Edit Mode go to the Meshes drop down, Normals, and Click Reset Vectors.

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Well, instead of using the Boolean feature and using the built-in Blender keybinds and tools, I made a similar design.





image

I do believe that was the solution that was being looked for, correct?
I created a cube, using S(XYZ) for mirror center resize, I shaped it to a approximate size of 2:1 block
Afterwards, either by using Ctrl + T or either just using the Loop Cut tool I’ve made my own locations where there should be dots for the holes.
Then, I’ve used Bevel in Vertices type selected the dots and created new faces inside of it. By using the key “I”, I’ve moved the face towards the inside and beveled using Ctrl + B the lines surrounding each of the holes, to make it cooler also selected the ones on the inside too, except the corners.

By applying that, I’ve moved some parts that I felt were most important for the cushion looking shape forward and applied the Smooth and after that Auto Smooth, by using the feature I’ve applied a certain angle level to the model that I can enjoy, so I did about 85 degrees. Auto Smooth makes it incredibly smooth, so making the Auto Smooth higher degree, it brings back the regular smooth, obviously the higher the more regularly smooth it looks.

If that’s not what you wanted to get, then I am sorry that my solution did not help.

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Thank you. I was confused at first but was surprised to find out that shading it flat ended up fixing the problem, as I didn’t know the boolean modifier made it shade smooth.

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