Using Fluid Simulations with Render Farms

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Status: ✅ Fully Supported

Incorrect and absolutely linked cache path

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Example Files

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Instructions

1

Set Up Your Fluid Simulation

Create your scene with the fluid simulation. This might involve setting up a domain, inflow objects, and configuring the simulation settings as desired.

2

Bake the Fluid Simulation

After setting up your simulation, you need to bake it.To bake the fluid simulation:

1. Select the domain object.
2. Go to the Physics Properties panel.
3. Under Fluid settings, navigate to the Settings section.
4. Click on Bake All or Bake Data (depending on your Blender version). Or Free All in the case that you’ve already baked.

Physics Tab (1) Cache Path - note the `//` in the path. (2) Free All and Bake All Button (3) Bake Path Folder Icon

In this diagram we point out the following:

1. the // is Blender’s way of saying “relative to the current file”, you may either type in your path here using //my-cache-folder-name or use the folder icon to navigate to the cache location. If you have a drive like C:\ or D:\ here you’ve not set the path correctly and it is still absolutely linked.
2. Click on Free All and Bake All to bake the simulation.
3. You can use the folder icon to navigate to the cache location (which we elaborate on below).

3

Choose Cache Storage Location

By default, Blender will pick a random temporary directory for you if you haven’t saved your .blend file yet which we don’t want!

• Verify the Cache Directory: In the Fluid settings under Cache, verify the Cache Directory path. It should be set to a folder that you can include when uploading.
• Ensure Cache Pathing is Correct: You should Free and Bake as needed so that the cache files are generated. Then make sure to save your .blend file. The last save ensures the pathing is persisted into the .blend and the bake step writes the cache out to the disk.

You can do this by either:

• Typing in the path using //my-cache-folder-name
• Using the GUI folder picker by pressing the folder icon (3 in the diagram above) to navigate to the cache location.

The name you set here does not matter, we only care that the path is relative.

When using the folder icon (via GUI), you should see something like this, note that you have to click on the Cog Icon to display the option to make the pathing relative.

When using the folder picker GUI, you *must* click on the Cog Icon to show the option for 'Relative Path'

4

Save Your Scene

After baking, make sure to save your .blend file. The baked simulation references are now part of your scene.

5

Zip Your Scene and Cache

Zip your .blend file along with the cache folder.

• Ensure the Cache Folder is Included: The cache folder typically has a name like cache blob or similar and contains the baked simulation data.

Your zip file should have a structure similar to this, where your file is included in the zip with your selected cache folder. Note that these extensions may vary from case to case.

Copy

Ask AI

your_project.zip
|-- your_scene.blend
|-- cache/
    |-- fluid/
        |-- [simulation cache files].vdb
    |-- config/
        |-- [cache config files].uni
    |--mesh/
        |-- [simulation cache files].bobj.gz

6

Upload and Render

Upload your zipped file to Renderjuice and start your render.

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Checklist

• Did you bake your fluid simulation?
• Did you save your .blend file after baking?
• Did you include the cache folder when zipping your project?
• Is the cache directory path in Blender set correctly?
• Are all necessary objects included in the bake?

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FAQ