by Ace Of 3D·Simulation
Images © Ace Of 3D. Used for product review; image policy.
Physics Gen earns its place in the superhive library by turning fiddly simulation parameters into a one-button randomization step across smoke, fire, fluid and particle setups, while leaving every property open to manual tweaking.
Physics Gen is a Blender add-on from Ace Of 3D that sets random values for physics simulations at the press of a button. Rather than adjusting parameters by hand every time, you select an object, add a quick simulation or set up your own, and let the add-on generate varied starting values.
The add-on covers smoke and fire domain randomization, fluid domain randomization, and particle settings randomization, and it can add random force fields. For smoke or fluid work, the domain needs to be selected first. Controls live under the 'N' tab in the Physics section and in the object properties panel, and every generated property stays open to manual adjustment.
Physics Gen is aimed at newcomers and experienced Blender users alike, letting you speed up your simulation workflow and use randomization as a base for custom sims. It lists compatibility from Blender 2.8 through 5.0, is Blender Extension compatible, and ships under the GPL license. A demo video is available.
Physics Gen is best for blender artists randomizing smoke, fire, fluid and particle simulations and speeding up their simulation workflow.
Physics Gen is completely free to download and use.
Physics Gen lists Blender compatibility from 2.8 through 5.0, and version 1.5.0 states support for Blender 5.0 and above. It is Blender Extension compatible, and both legacy and extension add-on versions are supported. Version 1.5.0, released in September 2024, was updated for Blender 4.2, fixed warnings from the panel UI, and fixed an id issue in the manifest file. If you run a recent Blender release, check the developer's page to confirm which download matches your setup.
Physics Gen appears under the 'N' tab on the right side of the viewport, in the Physics section. Select any object, then add a quick simulation or set up your own. For smoke or fluid work, make sure the domain is selected. You can also find the Physics Gen panel in the object properties. From there you can trigger randomized values or tweak any property or parameter to your liking, using randomization as a base for your own custom simulations.
Physics Gen is listed as free in this catalog, and it is released under the GPL license. For current licensing terms and any other details, check the developer's page directly, since terms can change over time. The add-on is a Dev Fund contributor and is marked Blender Extension compatible. The developer notes that access includes future updates, so returning to the downloads page keeps your copy current.
Physics Gen includes smoke and fire domain randomization, fluid domain randomization, and particle settings randomization, and it can add random force fields. For smoke or fluid simulations, make sure the domain is selected before running it, since these effects rely on a domain object. With a single button press it sets random values, giving you a varied starting point that you can then tweak into your own custom simulation.
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