The cast shadow was generated using the Adaptive Filter ip op. Note that i', using the Region Selection for the Ip Source. The selection selects for the background areas of the canvas. So the shadow is coming from the non-selected part.
I probably should have used a solid color background rather than just lightening the color fringe effect in the background areas to get better definition for the cast shadow.
The Color Palette Map ip op effect is using Luminance Index Mapping and the Smooth Option.
You want to build a color palette that has a lot of luminance variation between adjacent color palette entries to build the fringing colors.
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The cast shadow was generated using the Adaptive Filter ip op. Note that i', using the Region Selection for the Ip Source. The selection selects for the background areas of the canvas. So the shadow is coming from the non-selected part.
I probably should have used a solid color background rather than just lightening the color fringe effect in the background areas to get better definition for the cast shadow.
The Color Palette Map ip op effect is using Luminance Index Mapping and the Smooth Option.
You want to build a color palette that has a lot of luminance variation between adjacent color palette entries to build the fringing colors.