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| Extension | File type |
|---|---|
| GFC | Hybrido fields cache |
| RPC | RealFlow particle cache |
| F3D | Cache format for voxel data |
| VDB | Cache format for voxel data |
| ABC | Alembic particle sequence |
| ASS | Arnold scene source |
| PXY | Particle or grid proxy |
| BIN | Particle cache |
| PRT | Krakatoa's™ native file format |
| TIF | Tagged Image File Format |
| EXR | 32-bit HDR image format |
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Fields cache (.gfc)
This is a native RealFlow format that contains the fluid's entire field information. This data is also required to resume a Hybrido simulation and create secondary elements. In contrast to Field3D, this format does not provide compression, but it is faster to write. GFC files are stored in the project's “grid” folder.
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OpenVDB is an open source library developed by DreamWorks Animation and can store voxel data. The format can fully replace RealFlow's native GFC and it is possible to resume from interrupted simulations or create secondary elements from VDB files. RealFlow's fields have to be converted into VDB-compatible data and therefore it takes longer to write VDB files. OpenVDB supports compression. Since the format is an open source C++ library, TDs are able to write their own import tools. The RealFlow-specific meta data and many additional information can be found here. Please bear in mind that RealFlow's OpenVDB implementation is tied to Houdini's axis setup.
RealFlow's Graphs engine offers nodes to load, write, and visualize information from VDB files. Examples and downloadable graphs are available here.
Particles cache -Alembic- (.abc)
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Particles cache -Arnold- (.ass)
--->>This is the scene description format of Solid Angel's Arnold render engine. You can export simulation data to native ASS files for direct use inside Arnold.
Particles (.pxy)
“PXY” is an internal format that can be used with RealFlow and the RealFlow RenderKit. PXY is a proxy format and only stores a particle’s Id, position and velocity. Depending on the adjusted quality level under “Options”, some particles are left out during storage, but it is perfectly suited for high volumes of particles. There are five quality levels (best – draft) to choose from. They can be seen/adjusted with a double-click on the “Best” option right of the export resource's name.
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