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11 votes
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What are the advantages of turning on "cache BVH"?

From the 2.62 release notes - For renders where only the camera or materials are changing, while meshes stay fixed, it is now possible to skip the sometimes slow BVH step, by enabling BVH Cache in ...
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10 votes
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How can I keep a single frame of a smoke cache?

Blender 2.81 (not mantaflow) This solution works but was probably never designed to work like this, therefore I can't guarantee that it's a stable workflow. It was stable enough when I tested it ...
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  • 12.4k
9 votes

Can I save the baking cache?

When doing simulations in blender the results will be cached as you play through the animation. Most simulations will only keep the cache data in RAM until the blend file is saved, when you will get ...
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7 votes
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Why is Blender's V.S.E. Slow?

Short answer: There is no “rendered” cache. Not all codecs are equal. As to the first point, every single operation, including shifting resolutions from your source file to destination, alpha overs, ...
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  • 12.1k
7 votes
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Is it safe to delete the cache?

Yes, cycles caches BVH (Bounding Volume Hierarchy) files in there when Cache BVH is enabled in Render settings > Performance: Deleting them shouldn't do anything bad. Cycles will just regenerate ...
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  • 152k
6 votes

How to delete rigid body cache?

Under the menu: Scene selection > Rigid Body World > Rigid Body Cache > Free All Bakes > Reset Start and End > Bake This worked for me in 2.74. It took less than a minute to bake 325 frames.
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5 votes
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Operator Search: 'Free Data' not available in Blender 2.9 anymore?

The default behavior of the Operator Search dialog in 2.9x is to only list the operators that can be found in menus. In order to search for all registered operators, you currently have to enable the ...
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  • 23.9k
4 votes
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Why does blender delete the headlessly baked cache on startup?

After quite some digging around and wading through the source code, I found that upon initialising the ptcache for the smoke simulation, blender checks a flag ...
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4 votes
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How to reverse particle Cache in Blender 2.79

It's possible (although likely not advisable - but I found quite interesting) to manipulate the actual blendcache files to change the order - although you should avoid points where particles are ...
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  • 42.3k
3 votes
Accepted

How to save Animation Nodes cache without baking to mesh?

There is currently no built-in way to save cache persistently. However, for simple data types, you can store your cache in ID properties in objects. For instance, if you have a vector list ...
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  • 22.2k
3 votes

Transfer particle cache from one file to another

I was investigating this recently and had to resort to reading the source code to figure this out (blender/source/blender/blenkernel/intern/pointcache.c and ...
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  • 8,924
3 votes

Prefetch maxing out 20+GB of RAM over a 355MB jpeg sequence

If you are tracking, you need the whole sequence and at full resolution (which conveniently you didn't mention... HD, 4k?). Something to understand is that, even if your images are compressed as jpgs, ...
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  • 13.4k
3 votes
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How to parent or constrain baked particles to an object so they follow the object's animation?

The Particle Instance modifier seems to do the trick. Basically any object with the particle instance modifier draws the result of the simulation you point it to. but the object itself can be animated ...
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  • 121
2 votes

Unable to bake fluid after changing cache folder

I had the same problem. I had a special character (german ü) in the path of the blend-file, after removing that, everything worked fine.
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2 votes

Why is Blender's V.S.E. Slow?

To add to the answer above... The Sequencer only uses 1 CPU core Blender's Sequencer doesn't use all the available power on your computer. The video engine roughly uses one CPU core, and that's it. ...
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  • 168
2 votes

Modify a softbody during animation

After quite a bit of research I found out that: The physics engine creates the springs (representing edges and if 'Stiff Quads' is set the diagonals of each quad) only once on starting a render ...
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  • 64
2 votes
Accepted

Do "no cached" simulations give the same result in multiple computers?

If all the properties of a physics item are the same, then yes. Physics will work the same way everytime, if there is no dynamic wind simulation in your scene or something. Its blender, not real life.
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  • 669
2 votes

Is it possible to bake dynamic paint waves simulation as a black and white displacement map texture?

Dynamic Paint can output to different targets depending on the Format. In your example you're baking to Vertex weights. However, changing it to Image Sequence will give you a new Output panel that ...
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  • 42.3k
2 votes

Did I destroy my 12 hour render trying to save it?

If you didn't specify a place for it to be saved blender automatically places it in a folder on your C drive called tmp. C:\tmp\ you might find it there.
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  • 742
2 votes

How can I get import an .FBX point cache animation to Blender?

Blender's FBX toolset doesn't support point cache data. So you'll have to separate out the mesh from the point cache. Just export the object as an FBX, then save out your point cache in either the ...
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2 votes

How can I keep a single frame of a smoke cache?

Blender 2.82 (Mantaflow) For Blender 2.82 and Mantaflow this is fairly straight forward. Simply delete the files from the simulation cache which have the frame number in their name that you would ...
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  • 23.9k
2 votes

Blender Cache Error. 0 frames in memory Cache is Outdated

I had this "0 frames in memory, cache is outdated". My collection was empty. after I clicked RigidBodyWorld. Bake works:)
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2 votes

Video Sequencer Cache Button Exists?

In the preview sidebar, you'll find Prefetch Frames:
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  • 1,942
2 votes

Marvelous designer alembic export and textures

Yes, you can do that, I tested it today. The important trick is to make sure that you import the OBJ with the option to "preserve vertex order" under geometry drop down on the right side in ...
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2 votes
Accepted

Combining Cloth simulation cache?

... basically you have to rename cached .bphys files. First enable to Disk Cache checkbox, it gives you an access to saved cache on your disk in .blend directory. Than Bake caches Than for safety ...
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  • 28.4k
1 vote

Blender 2.82 Fluid Simulation can't resume baking

Blender does not support fluid bakes that can be re-started from a different frame. However, in mantaflow, this is supported. You might want to consider installing mantaflow for blender unless you are ...
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