2011

OpenEXR channels are assigned to the Composite RGBA channels according
to the following rules:
■ If the channel name part of the input channel (the string after the last
dot) is named “R”, “G”, “B” or “A” (case insensitive), then it is assigned to
its respective R, G, B or A channel.
■ If none of the input channels have an “.R”, “.G”, “.B” or “.A” suffix (case
insensitive), then they are assigned in alphanumerical order:
ResultInput ChannelsTo
RGBA image4 or moreR, G, B, and A
RGB2 or 3R, G, and/or A
A1A
Examples:
■ “.M”, “.N”, “.O”, “.P” input channels are assigned to R, G, B and A
respectively, resulting in an RGBA image.
■ ".X”, “.Y”, “.Z” input channels are assigned to R, G and B respectively,
resulting in an RGB image.
■ “.U”, “.V” input channels are assigned to R and G respectively, resulting
in an RGB image.
■ “.Z” input channel is assigned to A, resulting in an A image.
Channel Groups
In the Options tab, you can assign any channel to the R, G, B and A channel.
When the RGBA channels are available in the files, they are mapped by default
to the same channels in the composition or output channel. During import,
Composite verifies the mapping to determine that all the channels are the
same bit depth.
This list provides the user-defined channel groupings and mappings. Composite
provides a number of predefined names. Selecting a group performs the
mapping defined by the group. Channels that were identified as being part
Channel Assignments | 129