All effects and presets

Effect

2d Shadow

Cast a soft drop shadow from luma or alpha, with control over offset, blur and colour.

Drop shadows entered everyday design through page layout and early computer graphics, where a soft offset copy of a shape suggested light and depth without modelling a full scene. The idea is older than software: painters and printmakers used cast shadow to pin a figure to a ground plane.

In Rethings the shadow is driven by luma or alpha, so you can lift a silhouette, a logo or a cut-out subject and place it over a flat field. Offset, blur and colour become the lighting dials.

2d Shadow example
Example

Properties

  • Shape from

    luma works on any photo; alpha is for cut-outs

    Range
    Luma, Alpha
    Default
    Luma

  • Threshold

    shape cutoff; raise to reject soft edges

    Range
    0 to 1
    Default
    0.15

  • Invert mask

    flip inside/outside

    Range
    0 to 1
    Default
    0

  • Offset

    shadow displacement in pixels

    Range
    -80, -80 to 80, 80
    Default
    -50, -50

  • Blur

    soft edge radius in pixels

    Range
    0 to 20
    Default
    6

  • Color

    Range
    Colour
    Default
    0, 0, 0

  • Opacity

    Range
    0 to 1
    Default
    0.55

Command line

Requires Rethings Pro. Install the tool from Rethings → Install Command Line Tool… 

rethings apply --effect 2d-shadow --set maskSource=0 --set threshold=0.15 -i input.jpg -o output.png

Gallery

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