John HM

Thanks for your response. I should have included that information with my original post. I guess I'm getting old. My OS is Windows 10 latest update. and the Version of Photo I'm running is: 1.8.5.703. Thanks!

Hello, And, thanks in advance for any help that may be offered. I used to use the lighting filter all of the time. However, I haven't used it in a while. Just today I've a need to use the lighting filter again. But, much to my surprise it no longer works. The filter tool window appears with all of the controls and the lighting guides appear on the photo. However there is no light. Moving any of the controls has no effect. There is just no light. I would like some light! I am working on the actual photo layer and it is a 16 Bit RGB photo. Have I forgotten how to use the filter? Am I missing something? Any help is greatly appreciated. Thanks!