Surface Brush Studio — Paint, Scatter & Physics Placement

Surface Brush Studio is an editor tool designed to speed up environment creation inside Unity.

It gives artists and level designers a direct brush-based workflow for painting vertex channels, scattering prefabs, dropping objects with live physics, sculpting mesh surfaces, applying placement rules and baking clean results.

Instead of manually placing grass, rocks, debris, props or terrain details one by one, Surface Brush Studio lets you work directly in the Scene View with intuitive brush controls, presets, target locking and cleanup tools.

Use it for environment dressing, terrain detail passes, debris placement, survival scenes, forest floors, rocky areas, camping props, rubble fields, path dressing and fast level art iteration.

Use Cases

Surface Brush Studio is useful for:

• Environment art dressing
• Terrain detail passes
• Forest floors
• Grass and vegetation placement
• Rocks and debris scattering
• Abandoned/camping scenes
• Survival environments
• Rubble fields
• Roadside props
• Natural object placement
• Vertex blend mask painting
• Fast level art iteration
• Scene cleanup and baking

Key Features

Vertex Paint

Paint directly on mesh vertex colors using RGBA channels.

• R / G / B / A channel painting
• Add, Erase, Smooth and Replace modes
• Face and vertex preview in Scene View
• Fill, Clear and Smooth All tools
• Adjustable radius, strength and falloff
• Shift shortcut for temporary erase
• Fast brush workflow directly in Scene View

Scatter Placement

Scatter prefabs across a selected surface using brush strokes.

• Multiple prefab support
• Per-prefab influence control
• Per-prefab scale range
• Scatter presets such as Grass, Debris, Rocks, Forest, Camping and Rubble
• Random yaw
• Density multiplier
• Align to surface
• Scene object counter
• Auto parent organization
• Paint, Erase and Replace scatter modes

Collision-Aware Scatter

Avoid unwanted overlapping while scattering objects.

• Avoid collisions toggle
• Use prefab bounds
• Check existing scatter objects
• Check scene colliders
• Collision radius control
• Collision layer mask
• Max placement attempts

Live Physics Placement

Place objects using temporary physics and bake the settled result.

• Drop, Roll, Pile, Throw and Scatter Drop modes
• Fast, Stable and Precise quality modes
• Live physics object tracking
• Moving and settled object counters
• Random force
• Random torque
• Mass range
• Drop height control
• Fix intersections
• Bake settled objects
• Optional collider keeping
• Remove temporary rigidbodies
• Move baked results to a clean parent

Mesh Sculpt

Shape editable mesh surfaces directly in the editor.

• Raise brush
• Lower brush
• Smooth brush
• Flatten brush
• Smooth All
• Flatten All
• Reset Sculpt
• Radius and strength controls
• Shortcut support for fast adjustments

Bake & Cleanup

Finalize your edited scene with cleanup tools.

• Create backup
• Save mesh
• Bake physics
• Validate
• Fix issues
• Clean baked components
• Reset paint
• Reset sculpt
• Reset paint + sculpt

Compatible with:

• Built-in Render Pipeline
• URP
• HDRP