Hi, I think the example RenderEngine needs an update:
https://docs.blender.org/api/blender2.8/bpy.types.RenderEngine.html
E.g. def render(self, scene) should be def render(self, depsgraph).
Related: In the depsgraph documentation, there is scene and scene_eval, but both have the same documentation text:
Original scene dependency graph is built for
I guess scene is the original scene, while scene_eval is some kind of evaluated copy?
Which of these should be used by RenderEngines during export?
Thank you!