Its been believed that one cannot have the same DPI for a 3D space as a 2D enviroment (which is somewhat true) but I use this method to get them pretty similar.
DISCLAIMER I am NOT a mathematician and only have limited knowledge of 3D game development (Feel free to correct/criticize me in comments).
You need to have the following: A bit of time and technical knowledge.
The first step is to find the following values, pixels per 360 (pix/360) inches per 360 (in/360), and the amount of pixels actually traveled per inch (we’ll call this PDPI). You’ll want to have pyrolistical’s overwatch-dpi-tool/ open (NOT MADE BY ME). In addition to liquipedia’s starcraft2 Mouse_settings.
- To find pix/360 go to the DPI tool and find the number next to your resolution and multiply it by 360. For our example I’ll use a 1920x1080 screen at 18.64 pix/deg (6710.4 pix/360)
- To find in/360 enter your sensitivity, FOV, and DPI into the tool and copy the result. For our example I’ll enter 4 sens, 103 FOV, 1200 DPI and get 11.36 in/360.
- To find PDPI divide your pix/360 by your in/360. For our example 590.704225 PDPI (6710.4/11.36)
So to have similar DPI in menus to in-game we need to augment how fast the mouse moves over 2D space. We’ll do this with windows pointer speed (Which does NOT affect in-game speeds as overwatch uses raw input). You set your pointer speed to a modifier which brings it as close to the target PDPI and your done! For our example we’ll use value 6 (4/8 modifier) to bring our 1200 to 600 (pretty close to 590)
But wait there’s more! If you have a mouse with adjustable DPI you may be able to set it to almost 1:1. For my logitech mouse I can change DPI based on what game I’m playing or if I’m using the desktop. In desktop mode you set your mouse to the value that corresponds to your multiplier. In our example this would be 1181, because 1181*modifier(4/8) = PDPI (590.5).
Its a lot of work but it feels nice once you get it