Choosing Which Channels to Render

You can choose which channels to render into a movie or sequence of images. For detailed information, see Image Channels.

To choose a channel:

On the Output Settings panel, set the Channels options, as required.

The following options are available.

Select:	To:
Color	Render only the RGB color channels. This creates a 24-bit image.
Alpha	Render only the alpha channel. This creates a 24-bit image.
Color+ Alpha	Render both the RGB color channels and the alpha channel. This creates a 32-bit image.
Premultiply Color	Combine the color information with the alpha channel information using black as a base. This option is available if either Color or Color+Alpha is selected. For movies or images saved with the Color option (that is, no alpha channel), enable this option for best results.
Invert Alpha	Invert the alpha channel. When this option is enabled, pixels that were opaque become transparent, and vice versa. This option is available if Alpha or Color+Alpha is selected.