Here's how to cut vent holes in #Blender when #3DPrinting something like a #3DPrintedFursuitHead / #3DPrintedMask...

This uses the "Boolean" modifier, set on "Difference", which cuts areas out of an object based on where it intersects with a given object. If you can't figure this out, ask on the Blender Discord, and one of us will help: the documentation you find on this may be inaccurate.

To cut a hole, make a cone (or pointy cyllinder) with a base that measures larger than the width of the large joint of your middle finger. Place these with the base just inside the inside of the mesh where you want holes, and pull the point out so it's still wide enough to get a finger through where it exits. This will give you an efficient hole shape: bigger on the inside.

Try to fit them all in one object, unless they start overlapping, in which case, make a second one and do the modifier again with that one.

When the modifier is going and the cones are hidden, you should have holes.

Something I've got to say, as a first-time #FursuitMaker, it's really striking the #FursuitHead can look so bad for so long, then suddenly you get to the part where you shave and detail it and you finally start to see something good coming out of it.

I still think the muzzle of my #3DPrintedMask is taller than I was going for though, but it's bugging me less now that everything else is coming together.