Without a key, Twixtor functions fully but overlays a large red "X" watermark across your rendered video.
To get started with Twixtor Pro v7, follow these step-by-step installation instructions: twixtor pro v7 activation key
This is a major pro-level feature. The Pro version uses the alpha channel to help track dark images against mattes. This is incredibly useful for CGI (computer-generated imagery), masked footage, and keyed materials, allowing the plug-in to separate foreground and background elements accurately. Without a key, Twixtor functions fully but overlays