Yesterday, 09:39 AM
(Yesterday, 01:16 AM)jez9999 Wrote:(Yesterday, 12:16 AM)Ofnuts Wrote: (188,188,188) is actually the gray that is half as bright as white (ie, equivalent to a dense checkerboard pattern seen from afar).
In other words, you aren't taking in account the gamma encoding.
The trouble is, I'm exporting an alpha layer to a PNG and then applying that layer on top of another layer in a different piece of software (Imagesharp). That software appears to do the style of compositing (linear? perceptual?) that results in a 128,128,128 pixel, so I get a different image from that (darker) than from GIMP when I want to achieve the same image. Is there a way I can get GIMP to output the alpha values such that when the other software blends the layer with a background layer it will result in the same output as GIMP?
Try using the "legacy" blend modes (ie Normal(l))