Tv LayerBlendingMode
From TVPaintWiki
tv_layerblendingmode layerid
[Color|Behind|Erase|Shade|Light|Colorize|Hue|Add|Sub|Multiply|Screen|Replace|Copy|ReplaceSet|Difference|Divide|Overlay|Light2|Shade2|HardLight|SoftLight|GrainExtract|GrainMerge|Sub2|Darken|Lighten|Saturation]