The Blur map tooltip says that it is “centered on .5 gray”. Then, why do I get distortion with a totally gray map?
I tried many values, and it seems that the closest to doing nothing is between 73% and 74% saturation.
Are you applying color space correction? (try disabling sRGB in your texture settings)
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Yes, that was the issue. Thank you!
This stills happen but with extreme values for the scale (x1000) so I guess this comes from the precision of something between the texture and the rendering.
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Your posts are always helpful, thank you! 
I think it would be good if a hint was added to the documentation since this is easy to miss: https://docs.unity3d.com/Packages/com.unity.visualeffectgraph@10.2/manual/Context-OutputDistortion.html
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Thanks!
Yeah, this is a really good suggestion; I’ve asked our Technical Writers to take a look.
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Hey @Kirsche ,
Upon a closer look, it seems we already added that to the docs:
We’ll see if it can be highlighted more in some way to make it more visible.
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Maybe something in the tooltip of Unity? I must confess I didn’t check the doc for that particular field…
It seems the only hint the documentation needed was “Please don’t skip through it.”
Sorry about that…