Sounds better to do postprocess filtering explicitly? For example, adding random noise with amplitude 1/255 (which should be as invisible as the watermark), fol

Sounds better to do postprocess filtering explicitly? For example, adding random noise with amplitude 1/255 (which should be as invisible as the watermark), followed by a smart blur that blurs more in directions where the colors are more similar (making the blur less obvious to humans). But this is all moot really, if MS Paint is watermarking shit, it’s better to just use something else. Nothing from Microsoft is trustworthy.