I am creating a photo filter program and trying to do some actions in Photoshop CS5 in order to repeat them in code.
One action I stuck with is Vignette effect. This is typically gradient fill layer with "Vivid Light" blending mode. However, it is looking nice only when "Transparency Shapes Layer" checkbox is turned off.
What I see in Photoshop manual:
"Select Transparency Shapes Layers to restrict layer effects and knockouts to opaque areas of the layer. Deselecting this option, which is always selected by default, applies these effects throughout the layer."
However, it does not looks true because when checking / unchecking this checkbox, the image becomes completely different.
Just wanted to know if someone knows any insights on how this checkbox works.