tepat Hi! The jittering can happen if you are too far from the floor, (distance setting)
Can you share a gif or video ? (I am in the process of rewriting the all plugin, to make it smoother and better written FYI)

Yes, my map is very big, 80 000 x 60 000 meters
here is a video : https://drive.google.com/file/d/1WcttlAJGX74DgTQ9Tdib9YX0g2UGM9Ug/view?usp=sharing

at start of the video, i do a zoom , it's jittering, then I do a translate, it's jittering, and then I rotate, it's not jittering.

Anthony nice that you rewrite the all plugin ! do you know when it will be available ?

tepat Ok so the jittering appears only while you are translating or even after (doing nothing) ?
At which distance is it starting to happen ?
What's your setup ? computer/tablet ? mouse/touch screen ?

thanks!

yes it appears only while i'm translating or zooming
it's starting to happen right after i launch the app
it's on pc win 11 with mouse

tepat The jittering on high distance is apparently due to the engine. The quick fix is to put "1" at Near Clip Plae value on the camera component!
https://forum.unity.com/threads/solved-increasingly-inaccurate-results-of-screenpointtoray-as-transform-size-increase-choppy.459818/