Elliptical Sections

Absorber Test 2:

Greater density of openings, more sponge-like appearance.

Here is a denser hole version...

Here's a quick render of the 3d diagram/animation of the pollution hitting the walls, splitting into different particles (chemicals) and changing color.

superAbsorber Test 1

These tests use a conical section to create the void pattern throughout the wall. The holes which create the voids are scaled, shifted, then lofted.