Thursday, 11 June 2026

Blender-School: Random Flow

 The city I'm building for Scene 002 continues at a slow pace. I realise I could save time by using Blender Guppy's excellent Random Flow add-on. It's great, but I always struggled to remember how to use it effectively, so lets get into it...

Documentation (updated recently after a significant change to the add-on's UI)

Random Flow

"Random Flow is a random mesh generator designed for fast and easy hard surface prototyping and concept art. This is a fast-changing add-on with lots of new functionalities in the future."

For science fiction environments, you often need to model a lot of surface detail that isn't particularly purposeful. Often, you are breaking up empty space with geometry and lines. Random Flow lets you quickly apply surface details by creating face-based panels and extruding them.


Once installed, you bring up Random Flow's master panel using Shift+F1 (see above).

  • Usually, Random Flow details consist primarily of Random Panels, which break up surfaces without significantly changing the form of the target object.

  • The details created depend on the size of the target faces; larger faces produce larger panels, while smaller areas naturally yield smaller panels. 

  • Randomisation is applied to generated/floating elements that are cut out of the target object, ensuring all changes are non-destructive. Randomisation can be applied in Object or in Edit modes.

Random Panels Page 1


Random Panels Page 2

There are a dizzying number of parameters. As Blender Guppy says, he could make the tool simpler, but such an effort would rob you of incredible fine control. 

The operator presets are a great addition; I should get familiar with the effects of each one.



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Blender-School: Random Flow

 The city I'm building for Scene 002 continues at a slow pace. I realise I could save time by using Blender Guppy's excellent Random...