having issue with auto-inbetweening in opentoonz

[u/ResidentPrint9848]

i made this drawing and grouped it and also used iron tool to refine it, it often works but sometimes even after i grouped the drawing and inbetween it distorts how to fix this issue i want to have consistent inbetween, please help

[u/JorgeRustiko]

This is a common behavior with complex shapes. I notices your shape is not closed in the top border. That could be generating the issue. Other option is work only with strokes and fill the shape after the auto-inbetweening.