For a 3D renderer, this is a straitjacket. It limited the size of sets and the number of characters that could appear on screen simultaneously.
Muvizu’s killer feature was its audio-driven lip sync. You plugged in an MP3 or WAV file, and the software automatically generated phoneme-accurate mouth movements. The build refined this with a lower latency response, making cartoon dubbing seamless. Muvizu Play 1.10. 2017.04.06.01R -x64-
This stability was crucial for the user base, which For a 3D renderer, this is a straitjacket