Mesh index warning at extrusion

[_Aka_]

Hi,

Your issue comes from the the fact that your extrusion's cross is the same spline as your extrusion's path.
https://curvyeditor.com/documentation/generator/modules/shapeextrusion#input
By setting a rectangle for example as your extrusion's cross, your will have a coherent result. Then just follow the warnings displayed in the modules.

PS: If the spots limitations is too low for you, search for this code in BuildVolumeSpot.cs, and set whatever value you want:
const int MaxSpotsCount = 10000;