PhysiStack PRO – Physics Object Painter

PhysiStack PRO lets you scatter and stack prefabs in your Unity scenes using real-time physics. Instead of placing objects by hand, you simply paint with a brush in the Scene View and watch them fall, collide, and settle naturally.

Three spawn modes give you full control:

• Instant — objects are spawned and simulated immediately as you paint, settling into natural piles before you lift the brush.
• Place & Drop — stage objects mid-air while painting, then release the mouse to drop them all at once for a controlled avalanche effect.
• Single Place — precise click-or-drag placement on any surface in the scene, no target surface required. Uses its own dedicated prefab list.

Once you're happy with the result, the built-in Bake and Combine tools let you optimise the scene in one click — remove physics components, mark objects as static, or merge meshes by material to minimise draw calls.

All operations are fully undoable and editor-only — nothing is added to your player build.