Light emitted from a Principled Shader, will illuminate another object, with a Principled Shader, but if an image texture map is used it is not visible.
The attached image shows an object emitting light and illuminating a panel, with a logo. The panel appears dark brown. The panel's base color is white, but there is a wood image texture applied that shows, when a light is added.
I have tried this with Mantra PBR and Ray Tracing. The image is done with PBR. Is this a bug or expected behavior?
what you see is most probably reflection of your emissive object, not the diffuse lighting caused by it
you may need to increase intensity of your emissive material or geolight to start seeing the actual diffuse lighting on your logo and therefore your texture
also if not using geolight make sure your diffuse limit is at least 1
