I have 2 objects. One is a big cube and one is a small cube (50% the size of the big cube). I have placed the small cube with in the big cube. Now what I would like to do is to make the small cube become an inner cavern with in the big cube.
What I mean is that I want to use the small cube as a sort of 3d eraser and take away mass from the big cube so that a small little cube room is left inside.
ahh no my friend, the idea was to make a cavern with out an enterance . i know the extrude technique. you see, what i really want to do is to be able to place a camera & light with in this cube cavern and render the inner walls. any ideas?
Please study the .blend that I attached to my first post. It is a cube within a cube
no entrance. Inside you will find a Camera/Lamp and Sphere the render it produces
is of the inner walls…
You don’t really need to cut out the shape inside the cube for that. If you’re not planning on making any holes or windows to the outside, just flip the normals of the cube, and place camera + lights inside
Just think of the normal as the direction the face is pointing. To flip it select the face and press W. There is an option in the list to flip normals. Also in edit mode under the Editing (F9) / Mesh Tools More is the option to draw the normals on the object.
Aah yes, solids-based modelling, I remember that from calligari truespace…and various CAD programs.
Boolean operations were mentioned above, that is what you are asking for.
make sure you are not in edit mode (make sure both cubes are that pinkish purple color.)
Select the smaller cube, then hold the shift key and select the larger cube.
press space bar, select Object->Boolean from the menu.
in the next menu, select Difference (subtract)
This will leave you with 4 cubes. 2 smaller ones and 2 larger ones. (It preserves your original object) However, one of your larger ones will now have the cavern you were seeking.