I'm trying to produce a 3D space with a network of hollow spheres (porosities) at regular intervals, with only a few specific spheres having some degree of freedom in their position. Is there any free 3D software around that works well with sponges and regular trabecular solids?
Let's give an example: a cube with an allow sphere centered at each vertex, plus one extra sphere inside the cube with its center's position tunable. Then these cubes get multiplied in a 3D texture.
The real object is a little more complex than a cube, but the principle is the same.