See also:
Step 8
Changing the alpha interpretation
If the frame becomes flooded with white, it suggests that the current (default) interpretation of the alpha channel in PatchMaker differs from that of the overlay’s alpha channel.
Select the overlay in the Tracklinå panel by a mouse click (the overlay bar will get the rugged texture).
In the property editor, set the value of the Alpha Interpretation property to Straight by selecting it from the drop-down list:
Now, if you turn the mask display off in the Display Mode panel, you will see that the overlay is applied correctly to the frame it was created for:
Frame #3 with applied overlay
By turning the playback on, you will see the same situation as with the mask: the billboard moves and the overlay does not. As previously mentioned, the segment was not yet processed and its data layer still contains identity (zero-motion) transformations.
