Working with ARRI Looks & LightSpace CMS
Using the ARRI Look tools within LightSpace CMS
ARRI Look capability within LightSpace enables the conversion of any ARRI Look files into LUTs, as well as the conversion of LUTs into ARRI Look files, enabling the simple generation of user designed Look workflows.
Such manipulations can be performed with LightSpace LUTs+, and the full LightSpace XPT versions, with some restriction on the functions available within the LightSpace LUTs+ version. Check the LightSpace Options page for details on what functions are/are not available.
Arri Look Generation from 3D LUTs
One of the most common requests for the LightSpace CMS ARRI Look tools is the generation of ARRI Looks for use on-set when shooting with ARRI cameras, generated from existing LUTs.
ARRI Looks are based on simple colour controls, including Saturation, Printer Lights, CDL controls (Slope, Offset, and Power), and mono free-form curves for each RGB colour channel. While this is a fairly powerful set of parameters, there are some restrictions on what colour changes can actually be represented.
The ARRI Look Export function will do the best possible to faithfully represent the LUT being 'extracted', based on the relatively limited capability of the ARRI Look format. The more complex the LUT the less accurate the extracted Look data will be - obviously - but the results can be surprisingly good.
Note: it is imperative to realise that the generation of ARRI Looks for 3D LUTs can never be an exact science. The final result will always be something of an approximation based on the restriction sof the ARRI Look format.
To enable access to the ARRI Look tools first load the source LUT into LightSpace CMS. Loading the LUT enables access to the 'Edit' menu, where the 'ARRI Look' tools can be found. From the two options provided select 'ARRI Look Export', which will pop-up the relevant menu window.
Select the required parameters, and select the 'Extract' button to perform the ARRI Look extraction operation.
After extraction a pop-up window will give a percentage accuracy figure for the extraction - please note this value tends to be pessimistic!
When the percentage accuracy window is dismissed a further window will offer for a new LUT Image to be generated with the extracted ARRI Look data - enabling a direct comparison of the ARRI Look data with the original LUT, including applying the original LUT and the LUT generated from the extracted ARRI Look data to test images via the LUT Preview function.
Manipulation Post Extraction
With the various LUT Manipulation tools contained within LightSpace CMS (please check the LightSpace CMS version you are using includes the LUT Manipulation tools) it is possible to adjust the ARRI Look, via the auto generated LUT to get the final result as close as possible, again using the LUT Preview function to check the effect of the LUT Manipulation changes.
LUT Generation from ARRI Looks
Converting an Arri Look file into a 3D LUT is a lot simpler, and will generate very accurate results.
To enable access to the ARRI Look tools first generate a Bypass/Null LUT within LightSpace CMS, via 'File/New'. Generating the bypass LUT enables access to the 'Edit' menu, where the 'ARRI Look' tools can be found. From the two options provided select 'ARRI Look Import', which will pop-up the relevant menu window.
Select the required parameters, and select the ARRI Look to be converted via the 'Open Folder' button, and navigating the the Look file.
If a bypass 'blank' LUT is not the presently active LUT within LightSpace the ARRI Look data will be concatenated with the existing LUT configuration, which can be a very powerful tool, for example converting am ARRI Look to operate within a different colour space.
With the generated LUT held with LightSpace CMS, it can be exported in any LUT format as required, or directly uploaded to integrated LUT boxes or monitors, using the 'Export' or 'Upload' functions.