cutting a hole in cube with subdivision surface modifier already applied

Support Modeling
1

I’m trying to cut a rectangular hole in my cube. You can download my source file on this link. The cube was tempered with subdivision modifier and and the shading is smooth. This is what I got so far:

http://i.stack.imgur.com/YwQXv.png
YwQXv.png1728×910

I used the left block and a boolean modifier to cut a hole. The problem is that I need my hole to be exactly the same shape as block-right angles are necessity. The Blender gives a warning that my boolean modifier is not the first one and that results may not be what I expect. So how do I cut a block hole out of the object with smooth surface? This really bugs me and I’m very thankful for your help.

2
  1. In edit mode, select the cube vertices only (the uploaded .blend has one extra vertex selected)
  2. Still in edit mode, press Shift+E to set the “crease” value – drag your mouse to the right or type in the number 1 to maximize the value
  3. Apply an “Edge Split” modifier below your subsurf modifier.
3

Quick tip: the BoolTool addon is great as it allows you to apply non destructive booleans, and place your boolean before or after subsurf

4

Hi

[QUOTE=
The Blender gives a warning that my boolean modifier is not the first one and that results may not be what I expect. [/QUOTE]

It tells…The boleon modifier need to be first in the modifier stack…In the properties panel below add modifiers.

Eg. You have a subdiv modifier + a boleon modifier in the add modifier stack…Click the little arrow top right to move it up or down…To fix it.

There is a few thing there need to be right before the Boleon modifier work ass it should…Location in the stack is on of them.

Another is Scale…When You add a mesh it’s Scale is 1 - If You change the object in object mode the Scale change.

Click big box in Your Blend file…And look in - N Panel - Transform - Scale…Scale isen’t 1…It can give problem when You use modifier…So…select the box Press Ctrl + a and select apply rotation and Scale…To set Scale back to 1…:slight_smile:

Last is normals… In Edit mode… T Panel - shading Normals…Below is recalculate…Use it to check Your mesh.

Hope this make sense…Puff Puff

Tai

5

Is this a boolean usage exercise? If not - use I-key Inset on selected opposite faces. http://www.pasteall.org/pic/show.php?id=90368

Edit: Inset works on several selected faces as well.

6

kind of sloppy ( edge loops ), but what the heck…