I want to glow the mesh plane, when I illuminate an area by the glowing mesh, the light spoils the environment where it meets, it's blurring and blending colors together. I'm in section materials and and I have indicated emission on the mesh plane which has to glow. what is the problem?
I set the strength to this level (you'll see on new screenshot) to be noticeable. 1.0 strength has the same defect. I turned off the main light.
I watch a tutorial where the mesh shines quite strongly and illuminates a specific area. don't understand what's wrong with my mesh