Light streaks on top of shadows

[Ofnuts]

(07-29-2019, 09:49 AM)EightSeven6 Wrote: https://drive.google.com/open?id=1kpLuuB...LPyni4lvs1

here's the sample XCF I've been using, but even moving the shadow to cover the light doesn't work, I tried it, I tried making the shadow larger and fitting some pixels of it under the border too, with no effect

(I couldn't attack the xcf directly even tho it's smaller than 500kb...I linked to my drive instead)


Also, I'm not using the actual dark purple frame as the shadow's origin, I'm using the other layer called "Background 1" which is light purple, that layer at least shares the edge with the darker purple, it definitely doesn't go past the edge

When you zoom in, the light edge either disappears or keeps its size:

   

And you can explore the image using the Pointer dialog, you won't see the value/luminosity increasing near the edge.

So, it is an optical illusion... (that you can perhaps counter-balance).

This said, normally, drop-shadow layers are under the layer for which they are a shadow, so that they can extend under the opaque parts.