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Height fog volume with exponential falloff

In your harnessBlender toolMIT

Add a box of volumetric fog whose density falls off exponentially with height above its base and drifts in noise patches, with scattering colour and anisotropy, shown as bounds in the viewport. Use it for morning mist, valleys, dungeons and atmospheric depth.

Render of Height fog volume with exponential falloff
The render its check recorded in Blender 5.2.1, 192 by 192 pixels.

What it takes and gives

Operator
baltor.fog_volume_height
Parameters
size, density, falloff, breakup, noise_scale, color, anisotropy
Result
A box mesh named Height Fog with the volume material Baltor Height Fog.
Blender
4.2 or later
Axes
Blender Z up, -Y forward
Units
metres

Limits. Volumetric rendering is slow and noisy at low sample counts; EEVEE renders volumes with its own approximations. The fog fills only its box, so its edges show if the box is smaller than the view. Density follows the box's own base height from its origin, not the scene floor. The visibility in the report is the rough 3 / density rule for a dense medium. Verified in Blender 5.2.1 with Cycles CPU; written for the 4.2 API.

Details

Kind
Blender tool
Engine
Blender 4.2 or later
Files
11 files, 109.1 KB
Licence
MIT
Declared effects
runs commands
Checked with
Blender 5.2.1, background (Cycles CPU for previews)
Checks
addon install and enable, operator runs with defaults, blender data matches core, addon disable unregisters, script mode runs, clean reopen addon file, clean reopen script file, gltf separate export, engine output clean
Techniques
Exponential height fog d0 exp(-(z - base) / h), Principled Volume with Henyey-Greenstein anisotropy, Noise breakup of density
Tags
blender, volume, fog, atmosphere, lighting, principled volume, cycles
Identity
library.supply.creative_originals.8c0f72021b4158cd30b7e0e1.68d035fd2f149b70
Version
68d035fd2f149b70e8e512a4dacdf3a3771f620a39431e2b4eeef53ecc3d9cea

The version is the SHA-256 of the item your harness downloads; every file in it names its own checksum.

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