I think it's pretty agreed upon here that 2D to 3D "cursor speed matching" lies somewhere around 65% monitor distance matching, depending on edge to edge distance. But some are saying that to convert between different fovs in 3D games, 0% is the way to go, whereas Joshua Willis' post is saying that an average of 20% is the way to go since I never go higher than 126 hfov.

My settings are 960 * 540 with 102.884 dpi, which results in 23.7005 cm edge to edge.

(360/106.26)(23.7005-(23.7005*0.1591183424841393))= 67.51885621 cm/360

When using the monitor distance calculator, to convert from 2D to 106.26 fov, it is roughly 65% that works here to achieve that same cm/360, as we've already established. Now if I wanted to convert from 106.26 to 51.77 hfov:

I can use 0%, which results in 186.2257 cm/360

Or I can use 20%, which results in 182.5608 cm/360

Well if the 2D to 3D way that I just used works to give me a 1:1 for 106.26 hfov, couldn't it do the same to give me a 1:1 for other fovs? Why not do that instead of monitor distance matching between the fovs? So I used the same formula to convert from 2D to 51.77 fov this time:

An angle of 51.77 gives and arc length of 0.9035569538 and a chord length of 0.8731325395

From arc length to chord length, the percent increase is 3.48451271%

(360/51.77)(23.7005-(23.7005*0.0348451271))= 159.0665463 cm/360

As you can see, between 106.26 and 51.77 it is neither a monitor distance matching of 0% nor 20%. I did this between other fovs, and the monitor distance match is close to 65% but never the same exact percentage, and definitely not 0 or 20%. I don't know if this is a coincidence that this time it's still 65% between 2 fovs instead of between 2D and 3D, or if if I'm seriously missing something here. But anyway, isn't it correct that I should use this formula and the 2D edge to edge distance, to figure out sensitivities at different fovs?

Edit: Alright well, while writing all this GLiSN answered my question in an edit that wasn't there when I read it the first time, ahah.

**Edited by Kilroy, 18 February 2017 - 03:14 AM.**