Volume Import Settings

Volume Grids

OpenVDB files can consist of multiple Voxels/ data sets. For example, if you imagine a cloud of smoke, a set of Voxels, for example, can be used for the temperature and another set for the density, with even an additional vector set (e.g., Voxel velocity, which can be loaded in Cinema 4D but a further use is not (yet) possible).

All data sets in the file are displayed in this list (both Voxels and other files are arranged in a three-dimensional grid) and can be activated for import (the Import to Project Location option must be enabled).

Scale

This factor can be found at numerous locations throughout Cinema 4D when importing or exporting foreign formats. Therefore, don’t be surprised if the term ,export’ is used if this factor is seen in an import function (this factor is explained as a whole here).

This factor lets you scale files upon import/export, i.e., practically all relevant numerical values saved in the file or those to be saved will be multiplied by this factor and then saved - or interpreted when loaded.

The unit at the right in turn defines how upon

• Import the numerical value saved in the file is converted to the current Cinema 4D unit. Example: if an X value of 1 is saved in the file and you define Feet, the X value will be converted to 30.48 cm in Cinema 4D (if centimeters are defined by default in Cinema 4D).
• Export numerical values are saved in the file. Example: an X value is set to 100 cm in Cinema 4D. If you define Feet for export, the exported file will save a numerical value of 3.281 (1 meter = 3.281 feet).

More information about units and scaling can be found in the Project Scale section.

Animation
From [0..2147483647]
To [0..2147483647]

If Cinema 4D recognizes that the import file is part of an animation, you can select here which part of the animation should be imported. You can then define the From and To frame range.

Group Objects

As described above, an imported file can contain several data sets. These can:

• be loaded as separate Volume Objects individually (option disabled)
• be loaded as a combined Volume Set (option enabled)

Import to Project Location

If this option is enabled, an external *.vdb file will be saved using a relative path to a folder named vol in the location of the scene file when the scene file is saved.

If this option is disabled, the external *.vdb file will be linked using an absolute path.