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Skitter fills any surface with walking insects. Click a floor, a wall, a sofa or a whole room and a swarm bursts out of that point, crawls across the mesh, climbs over edges and keeps walking. Pick one of 21 species, from garden ants, cockroaches and scarab beetles to house spiders, tarantulas, centipedes and woodlice, then set how many, how big, how fast and how dirty. The swarm is one Geometry Nodes tree that reads a baked walk, so thousands of bugs stay light in the viewport.

Every bug is a real anatomical model with jointed legs that step in a real gait: alternating tripod for insects, tetrapod for spiders, a metachronal wave for centipedes. The legs move in the material with shader displacement, so no extra geometry is made, and the bugs are drawn as GPU instances that are never realized unless you ask for a mesh. Each species has its own close-up surface detail, with pits, hair sockets, cell sculpture and painted markings, so a macro render holds up.

Choose how the swarm behaves: Burst out of the click point, Pour out one after another, Infest the area, Flee in panic or Swarm In from far away. Switch between Clean, Dusty and Dirty bugs, tint the whole swarm, and press Surprise Me for a new random version of the selected swarm. Editing one swarm never changes another, even a duplicate. When you are done, Convert to Mesh bakes the bugs at the current frame into plain mesh objects, or Extract Single Bug drops one standing bug at the 3D cursor.

21 species to choose from
Ants, cockroaches, scarabs, ladybugs, spiders, tarantulas, centipedes and more. Every species has its own body, gait and surface.

Click, then pick a species
Click a surface and the swarm walks out of the point. Pick a species or a behaviour in the sidebar and it rebuilds in a moment.

Surprise Me
One button, a new random swarm: species, count, behaviour, speed and condition.

Five behaviours
Burst, Pour, Infest, Flee and Swarm In, with the same ants.

Features

• 21 species in five groups: ants and termites, roaches and beetles, other insects, arachnids and many-legged animals
• Click any mesh surface to release a swarm, and move the burst point later
• Five behaviours: Burst, Pour, Infest, Flee and Swarm In
• Life-size bodies with Bug Scale, size variation and color variation
• Clean, Dusty and Dirty condition, gloss and an optional tint
• Shader-displaced legs (or geometry offset), real gaits, twitching feelers
• GPU instancing with levels of detail, off-camera culling and a viewport amount for big crowds
• Per-species close-up textures and surface detail
• Surprise Me, edit isolation for duplicates, Re-bake Walk
• Convert to Mesh and Extract Single Bug
• Picture-driven sidebar with a species gallery
• Works in Cycles and EEVEE

Requires Blender 4.2 or newer. Tested on Blender 4.2, 4.5 and 5.2 LTS.