# Baking Smoke Simulations¶

Smoke Cache options.

Baking is used to store the outcome of a simulation so it does not need to be recalculated.

Smoke baking settings are in Properties ‣ Physics ‣ Smoke ‣ Smoke Cache. Unlike most physics simulations smoke physics has some settings that are specific to smoke.

## File Format¶

File format that the cache data is to be stored.

### Point Cache¶

Blender's own caching format.

### OpenVDB¶

Advanced and efficient storage method developed by DreamWorks Animation.

The simulation fields can be found in the .vdb files under the following names:

• "color"
• "density"
• "heat"
• "heat old" (the temperature at the previous frame)
• "flame"
• "fuel"
• "react" (reaction coordinates, used for fire)
• "velocity"
• "texture coordinates" (used for turbulence)
Compression

Method of data compression.

Zip
Efficient but slower compression method.
Blosc
Multi-threaded compression with about the same quality and size as Zip.
None
Do not compress the data.
Data Depth

Bit depth for writing all scalar (including vectors), lower values reduce the file size of the cache.

Float (Half)
Half float (16 bit data). Gives less data with the benefit of smaller file sizes.
Float (Full)
Full float (32 bit data). Gives more data at the cost of larger file sizes.