Use the Colour Space Architecture options to select between the two basic colour grading modes — Linear and Log — for use on the project. These modes configure the system and set certain user interface options specific to the mode.

Generally speaking, a project should consist entirely of either log or linear files. For example, film-based projects are usually graded in Log mode, while video-based projects are usually graded in Linear mode. You should set the architecture to the mode you are planning to work in. If some source files are different from the mode you want to work in, you can convert them before using them. For example, if you are working in Linear mode, and you have a few log files, you can convert them to linear after bringing them into Lustre. To convert a shot from log to linear and vice versa, use the Input LUT menu. See Input LUTs.

The colour space architecture can be set differently per grade, which may be useful in some circumstances, but typically you should set the architecture for the entire project before beginning. Once you start working on your shots, you should not change the architecture as this affects the images and may create unwanted results.