– Make sure all lights have ‘ambient illumination’ checked. (maybe ‘show illumination’ too).
– Select Objects to bake
– Select render > bake object.
– Check illumination, Single texture. (also replace objects for final version).
– Apply baked jpeg / png in cinema4d as the color texture, and not luminosity of the material.
Import to Away3D 4 (Dark Texture Issue – Solution)
– Open the image in photoshop and re-save, then import the texture. This fixes the issue.