Can't use the boolean modifier on a roblox head in blender?

[IsDatYoMama10 (TheCashConnoisseur)]

Im working on creating some gore for my game through this tutorial.

I’ve followed all the steps, involving the plugins and importing the dummy into blender. After removing everything other than the head (since that’s all I want to edit right now), I’m left with this:

The head is purple because face orientation is on

After following the tutorial, I put my deformed ico sphere on top of the head:

But when I use the bool tool’s auto boolean difference, I’m left with this:

They combine into one object and the normals of the ico sphere are flipped

My best guess is that the roblox head mesh is whacky and blender doesn’t like that. If that is the case, Can someone send me a dummy model I can use?

EDIT: I tried using the same ico sphere with other models like a default cube and cylinder and it worked fine. It seems like the Roblox head is the only problematic thing

[IsDatYoMama10 (TheCashConnoisseur)]

I found the solution. The roblox head model is flawed and full of tiny gaps that ruin blenders ability to use boolean. All you have to do is select the head, go to edit mode with TAB, press a to select all and use `Mesh > Clean Up > Merge by distance. This fixes the model