Topology rewrite: the shape is now generated from distinct motion systems instead of one deformable blob. Topology changes should be audible: Arena = even circulation, Loop = orbital travel, Chambers = clustered bursts, Tunnel = sparse stretches with transfers, Bifurcation = split routing, Trap Field = local chatter. Materials still color the wall and shape the sound.
Hard
Rubber
Sticky
Grainy
Master
Ball
Topology + Material
Material bar sets how much of the perimeter belongs to Hard, Rubber, Sticky, and Grainy. Topology sets the motion ecology; the four sliders reshape that ecology without bringing back parameter soup.