There’s now a page with some basic explanation about Mango color spaces on the wiki, and a package of frames in 2K in a few different color spaces (about 250MB). There are linear EXR’s with ACES, S-Gamut and Rec. 709 chromaticities, and sRGB PNG images with and without the ACES RRT (film like look) applied.
If you want to try grading in a current version of Blender, the linear Rec. 709 EXR files are the ones to use, since those are in the color space Blender expects. the same usually goes for other applications without ACES support. Below are some images without any film like look, and without tone mapping applied to deal with bright colors, just the result you see when loading the Rec. 709 EXR files in Blender.
Some things we learned:
- Not all linear color spaces are the same, the chromaticities can be different, and it’s important to match those up! After converting to the right linear color space, we can load up the EXR’s in Blender and view them with the same colors we saw on set.
- We can do rendering, compositing and grading in the standard Blender linear color space, and still use ACES footage and deliver ACES as long as we use the right transforms, without any loss in quality. This helps us because our existing .blend files are all assuming this color space, and it’s no fun having to change that halfway the project.
- We’ll need OpenColorIO integration if we want to take advantage of the ACES film like look, and to make it easier to export to various display devices (monitors, HDTV, projectors, ..). And of course to make it possible for other users to set up a proper color workflow without the need for batch converting image files before opening them in Blender.
- Converting a render for display on a monitor is not only about using the correct color transformations, but also artistic choices. We’ll need to do some experimenting to figure out the default look we like, as a starting point for grading in all the shots.