I’ve created a Earth shader which shall show the city lights on the unlit part of the Earth. I’ve masked the textures accordingly. However when using a normal map the emissive color is shown on normal map shadows even when masking.
In order to highlight the issue I’m using a simple red color as emissive for the first two pictures. As you can see the shades generated by the normal map are emissive as well even the mask should hide the color in those areas. It’s a little unclear whether its a bug or a feature.
with normal map
without normal map