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— Enable Local Caching of Loaders: Files will be copied into the LoaderCache path set below or in the Path Maps preferences.
— Cache Multi-Frame Files: Files like AVI or QuickTime will be copied into the LoaderCache path. This may take some time if the file is large.
— Don’t Cache Files from Local Disks: Files that do not sit on a network drive will not be copied into the LoaderCache path. You can disable this option if you have, for example, a fast SSD cache drive and want to use it for local files as well to speed up file access while working interactively.
— Only Files Smaller Than xxx MB.: Files larger than the value set here will not be copied into the LoaderCache path.
— Cache Path Separator Character: When Enable Local Caching of Loaders is enabled, you can use this setting to rebuild the path of the original files in LoaderCache.
For instance, given the default “!” character, the original path X\Project\MyShots\ Shot0815\ will be translated into X!Project!MyShots!Shot0815! in the LoaderCache path. Other separator characters may be used, including the “\” character, which will use subdirectories in LoaderCache: X\Project\ MyShots\Shot0815\.
— If Original File Is Missing: This setting provides three options to determine the caching behavior when the original files can’t be found. The Fail option behaves exactly as the Default Loader in Fusion. The Loader will not process, which may cause the render to halt. The Load Cache option loads the cache even though no original file is present.The Delete Cache option clears missing files from the cache.
— Cache Location: For convenience, this is a copy of the LoaderCache path set in the Path Maps preferences.
— Explore: This button opens the LoaderCache path in the macOS X Finder window or a Windows Explorer window.
— Clear All Cache Files: This button deletes all cached files present in the LoaderCache path.
Memory
The Memory preferences are only available in Fusion Studio. To control Fusion’s memory when using the Fusion page in DaVinci Resolve, open DaVinci Resolve’s Memory and GPU preferences.
Occasionally, it will be necessary to adjust the Memory preferences in order to make the best use of available memory on the computer. For example, some people prefer a higher cache memory for faster interactive work, but for final renders the cache memory is often reduced, so there’s more memory available for simultaneous processing of tools or multiple frames being rendered at once.
Caching Limits
The Caching Limits include options for Fusion’s RAM cache operation. Here, you can determine how much RAM is allocated to the RAM cache for playing back comps in the viewer.
— Limit Caching To: This slider is used to set the percentage of available memory used for the interactive tool cache. Available memory refers to the amount of memory installed in the computer.
When the interactive cache reaches the limit defined in this setting, it starts to remove lower priority frames in the cache to clear space for new frames.
— Automatically Adjust In Low Memory Situations: This checkbox will set the caching to adjust when memory is low. The console will display any cache purges.
— Leave At Least X MBytes: This setting is used to set the hard limit for memory usage. No matter what the setting of the Cache Limit, this setting determines the amount of physical memory available for use by other applications. Normally, this value should not be smaller than 25 MBytes.
The Memory preferences
Interactive Render
The Interactive Render option allows you to optimize Fusion’s processing based on the amount of RAM you have installed in your system.
— Simultaneous Branching: When checked, more than one tool will be processed at the same time. Disable this checkbox if you are running out of memory frequently.
Final Render
These settings apply to memory usage during a rendering session, either preview or final, with no effect during an interactive session.
— Render Slider: This slider adjusts the number of frames that are rendered at the same time.
— Simultaneous Branching: When checked, more than one branch of a node tree will be rendered at the same time. If you are running low on memory, turn this off to increase rendering performance.