webots-controller/include/wren/CHANGES.md

Differences between Webots and Wren

Here we try to document things that WREN does differently from Webots and that may require changes to existing worlds.

IndexedLineSet

Before, the IndexedLineSet was shaded in the same way as all other geometries. This often results in a different
color for the lines than the material's diffuse color.
In the WREN branch, the IndexedLineSet uses a separate shader that directly applies the material's diffuse color.