how to make a square hole in a subdivided surface

Hatchnet · March 24, 2011, 3:20am

as the title says, how do I make a square hole in a subdivided surface,Blender keeps trying to make the edged rounded

3dementia · March 24, 2011, 4:56am

There are many ways. Here is one.

Hatchnet · March 24, 2011, 5:33am

Ahh yes, I didn’t think of that… Cheers

Hatchnet · March 24, 2011, 5:52am

Still not neat, my sides are recessed a bit. I’ve tried a few extra cuts but still no joy

AIBlender · March 24, 2011, 5:54am

Hi,

There are a couple of ways, the 2 most common are:

Put edge loops around the hole area and that will make the subsurface modifier keep the area more square.
Use Edge Creases, that will also tell the Subsurface Modifier not to round the selected edges. If you tab into edit mode and press CTRL+E with and edge selected you can select crease and then drag the mouse around to increase and decrease the crease amount, sharpening of softening edges that are being subsurfaced.

Attached is a blend file demonstrating how to do a square hole on a 2d and 3d plane using both control loops and edge creases.

Hatchnet · March 24, 2011, 5:59am

Ahh that’s what I’m after, thanks guys, creasing the sides and the edges works, btw, 2.5 uses Shift-E for creasing

AIBlender · March 24, 2011, 6:01am

Ooops sorry yes I was away from blender when typing this up, my fingers know the right keys even if I dont

Handy tip for Shift+E, thats direct to edge crease. Now I dont have to go through all the option in the Edges menu, awesome! Thanks Hatchnet

loopduplicate · March 24, 2011, 6:07am

there is also a slider for edge crease in the n panel (if that’s what it’s called.)

Hatchnet · March 24, 2011, 6:08am

Ha, I have this thing where I use an Internet browser and keep trying to use middle button to shift the page around.