When I open the Diffuse Glow filter, it appears as if inverted, or negative. What I expect to be a light halo effect shows up as a dark glow. How can I reset this filter to show the normal 'light' halo effect?
Thanks for your answers guys. I'm not sure we are on the same wavelength here. The above screen cap shows the filter in use and the undesired effect it is giving me. What is showing as black here should be white and glowing diffusely white through the window and (open) roof areas. Last time I used this filter it was working just great, but currently it is giving me the opposite effect to the one I desire. I tried your suggestion of layer styles > inner/outer glow but made no difference to the darkness of the diffuse glow filter. Anyway, I had never used this path before to get the desired effect and I should be able to reach it as did previously simply via Duplicate Layer>Filters>Distort>Diffuse glow. Any more ideas how to reset this filter to get the intended light glow effect please?