The latest development release of ModelConverterX adds a new drawcall optimization option for MSFS. It is now also possible to copy the color of the material color to the vertex colors. That allows multiple parts with the different colors to be rendered in one drawcall, if the remainder of their material settings is the same.

This new option is accessible in two places:

• In the Hierarchy Editor you can right click on a model part to perform this action.
• In the Drawcall Minimizer in the Material Editor there is a checkbox where you can select that material colors are copied to the vertex colors. If this option is not checked, the material colors will be replaced by textures, as the previous implementation always was.

Hopefully this new feature gives you more options to optimize models for MSFS.