As decals & textures have recently been upgraded to feature normal,metalness & roughness maps ( the update is fantastic ) - would it be possible to also get emissive maps added to this? They have been added to surface apperances already so this addition would make them consistent
You can make the emissive map a different decal and make the zindex one above and up the color value to like 2500, 2500, 2500 to make it glow as a workaround
This is a viable workaround but emissive decals have a number of benefits such as being able to be turned on/off, and only lighting up specific portions of the decal - whereas doing this would require you to either comprimise and have a duplicate decal that just lights up everything or spend time and create a seperate light decal which is only the illuminated parts of the decal. Good idea for the time being though.
the emissive texture is just a alpha mask, so you can go into something like photopea and use that alpha mask on your colormap for it to work properly, but yeah something like this should already be in the engine by default