If your subject has high-frequency detail (like a patterned shirt) or no detail, Twixtor fails.
The arm swings fast; Twixtor bends it like rubber. twixtor blue screen after effects
Why gray? Twixtor generates fewer artifacts on a solid neutral color than on a noisy blue field. Black is preferable because it contains zero chroma information and minimal luma variation. If your subject has high-frequency detail (like a
If your entire computer crashes while rendering Twixtor, it is typically due to the heavy strain the plugin puts on your hardware. How to fix common After Effects crashes Twixtor fails. The arm swings fast
If you have a blue screen background and a moving subject, and you cannot key it out first: