Image Alpha Filter

The Image Alpha filter replaces the image's alpha channel with the channel specified by the filter mask.

• Rendering menu > Video Post > Video Post toolbar > (Add Image Filter Event) > Choose Image Alpha Filter from the Filter Plug-In list.
• Rendering menu > Video Post > Video Post window > Select an Alpha Filter. > Video Post toolbar > (Edit Current Event)

The filter takes whatever channel is selected in the channel options under Mask (including g-buffer channel data) and applies it to the queue's alpha channel, thereby replacing what's there.

If you don't choose a mask, this filter has no effect.

There are no setup options for this filter.

Procedures

To set an object's G-Buffer ID:

1. Select the object.
2. Right-click the object and then choose Properties from the popup menu.
3. In the Object Properties dialog, set G-Buffer Object Channel to a nonzero value, and then click OK.

   The G-Buffer ID can be any positive integer.

   If you give the same G-Buffer ID value to more than one object, all these objects will be post-processed.