I need help with this png for the edge detection shader

Hello, I created this edge detection shader for the png and some of the borders don’t appear and when I went in the png adjustment section
to change saturation, brightens etc.
What adjustments should I use for my borders to not disappear?

Oh so cool, love it

I think the problem is this, the size

And perhaps you can try to deactivate texture streaming (in case you have it)
Also, take a look at the compression settings in the image, you can force to don’t use…

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What should I do for the size?

What about 4096 x 4096?
How it works? is kind of postprocess material or what?
Try r.forceLOD 0 too