Houdini 20.0 Nodes Geometry nodes

Paint Fog Volume geometry node

Creates a fog volume based on drawn curve

Since 13.0

Paint Fog Volume allows freehand drawing of volumes in the viewport. Different projection options allow the drawn volume to be snapped to either an orthographic plane or a collision geometry.

This is a digital asset build from the Draw Curve node and the Volume Rasterize Curve node.



Voxel Size

Size of the voxels of the created volume.


Sample Rate

Distance used to sample the curves.


Radius multiplier of the brush.


Live Reprojection


Projection is only done at drawing stage.

Send Rays

Reproject by resending rays on underlying changing collision geometry.

Use UVs

Use the uv coordinates from the initial projection on changing collision geometry.

Trim Curves

Delete parts of drawn curves that don’t hit any collision geometry.


XY/YZ/ZX/Screen Plane

Projection of the curve is done on specified orthographic plane.


Projection is done on the collision geometry that is plugged into first input.

Projection Center

Center of the orthographic projection plane.


Individual stroke information is kept as dynamic multiparms.

See also

Geometry nodes