I'll trying to find out what happens when a layer is in subtract mode with a global opacity not one or zero (i.e. what computations are done with the pixels values of the composite image of the layers below, the pixel values of the layer, and the general opacity). I have a git extract of the Gimp source code (and of gegl & babl) but got lost... Can someone help? _______________________________________________ Gimp-developer mailing list Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer