User Manual

Table Of Contents
LUT Processing Order
In elaborate workflows, facilities may apply multiple LUTs in a row before the image is seen. The
order of these is important since each LUT delivers different outputs. For instance, for a Cineon
file in Log color space you may often apply three LUTs. First a Log to Lin conversion, followed
by a Fusion View LUT to apply a color calibration, and a third one to correct it for display on an
sRGB monitor, or replace the last with a 3D DCP LUT if you are viewing on a projector.
When you select a node to be displayed, the image produced is processed before it is shown in
the viewers. The processing order is slightly different for 2D images and 3D scenes.
2D images first have the image LUT applied, and the result is composited over the checker
underlay. 3D scenes are instead rendered with OpenGL.
Image
Output
Image LUTs
Macro LUTs
Fusion View LUT
Post Processing
Checker underlay
Dithering
Order of processing
Buer LUT
(single)
Viewer
Output
The order of processing for 2D images and 3D scenes.
For either 2D or 3D, the result may be drawn to an offscreen buffer where a Buffer LUT can be
applied, along with dithering, a full view checker underlay, and any stereo processing. The final
result is then drawn to the viewer and any onscreen controls are drawn on top.
Applying Multiple LUTs
The viewer contextual menu can be used to apply multiple image LUTs into a processing chain.
To apply an additional LUT, do the following:
1 Right-click anywhere within the viewer.
2 From the viewer’s contextual menu, choose LUT > Add New.
3 From the Add New submenu, choose a LUT to add.
To remove a LUT other than the first LUT, do the following:
1 Right-click anywhere within the viewer.
2 From the viewer’s contextual menu, choose LUT > Delete.
3 From the Delete submenu, choose a LUT to remove.
A complete stacked LUT configuration can be saved to and loaded from a .viewlut file, as
described below.
Saving Custom LUTs
There are a variety of ways to create and use different viewer LUTs in Fusion. You can save
LUTs when you save viewer settings, you can import LUTs that have been exported from Fusion
or other applications, and you can open any one of the various supported LUT file types. In
addition, you can use the standard nodes in Fusion to create macros, which can then be saved
and used as a LUT.
Chapter – 58 Using Viewers 1163