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If you wonder how the `opacity` and `fill` in Photoshop layers differ (other than `fill` not affecting layer effects like shadow): the color of the layer is mul
by Etherlord87 4y ago
If you wonder how the `opacity` and `fill` in Photoshop layers differ (other than `fill` not affecting layer effects like shadow): the color of the layer is multiplied by the `fill`, then the result + color of the layer below are used to calculate the color based on blend mode, and then opacity lerps between the result of this calculation and the layer below. Lerp is simply linear interpolation TOP × OPACITY + BOTTOM × (1-OPACITY).