Sapphire Plug-ins for Open Fx: DissolveLuma


Transitions between two input clips using a pattern derived from their luminances. One clip often appears to emerge through the other. The Dissolve Amount parameter should be animated to control the transition speed.

In the Sapphire Transitions effects submenu.


From: Optional. Starts the transition with this clip.

To: Optional. Ends the transition with this clip.


Load Preset: Push-button .
Brings up the Preset Browser to browse all available presets for this effect.

Save Preset: Push-button .
Brings up the Preset Save dialog to save a preset for this effect.

Dissolve Amount: Default: 0, Range: -0.5 to 1.5.
The transition ratio between the From and To inputs. A value of 0 gives only the From input and a value of 1 gives only the To input. By default this parameter automatically animates from 0 to 1 to perform a complete transition.

Softness: Default: 0.1, Range: 0 to 1.
Increase for softer and slower transitions.

Use Luma Of: Popup menu,  Default: Difference .
Determines how the transition pattern is generated from the clips' luminance values.
Difference: similar areas transition first, different areas last.
Subtract: areas where the first clip is brighter transition first, and areas where the second clip is brighter transition last.
Mult: areas where both images are bright transition first, and areas where either is dark are last.
Screen: areas where either image is bright transition first, and areas where both are dark transition last.
Foreground: dark areas of the first clip disappear first, bright areas last.
Background: bright areas of the second clip appear first, dark areas last.

Invert Pattern: Check-box,  Default: off.
If enabled, the transition pattern is reversed in time.

Smooth Pattern: Default: 0, Range: 0 or greater.
If positive, a blur is applied to the transition pattern. This can reduce noise and give clearer edges to transition lines.

See Also:

Sapphire Plug-ins Introduction