You may carve or cast your Still-Life with Sculpty or other brand of modeling clay or with Geltrate. You may carve balsa wood, plaster, etc. You may fashion metal into shapes or assemble found items with hot glue. You may wish to paint your Still-Life to obtain the proper beam ratio. Silver, bright white, yellow show up best.
Dark colors disappear.
Transparent materials like glass and plastic work well. The best way to look at an object or 'Still-Life' is in the laser light. Double check all components for stability. Unstable objects in your scene may move during exposure, creating 'black holes'. Unstable components may wipe out the scene entirely.