No difference between HiDPI and LowDPI - 1440p

[michr12]

Need some help --

Setup :

• Macbook Pro 14 in
• Dell 4k 60hz monitor DP to TB
• Dell 1440p 165hz monitor DP to DB

The 4k 27 in monitor looks perfectly with BetterDisplay.

I recently added a 1440p 27 in monitor but the text is blurry and low quality even using HiDPI's feature on Betterdisplay. There is almost no difference (the quality looks better using lowDPI than HiDPI..)

I have spent a couple of hours trying to look different solutions online and try different things such as the enabling smooth scaling within BetterDisplay. The scaling slider also maxes out at 100% for the 1440p monitor while my other 4k monitor maxes out at 200%.

Thanks for your help

[waydabber]

Hi there, sorry for the somewhat delayed answer, I must have missed this question.

If you are using a HiDPI resolution at the display's native resolution instead of LoDPI, all you achieve is 2:1 supersampling which creates a kind of slight anti-aliasing/softening effect. It greatly improves screenshot quality and if you use accessibility zoom, it's really beneficial, however if you don't use any of these, there won't be any significant difference. With HiDPI at the native resolution each of the 4 framebuffer pixels in a logical pixel will be averaged and sampled down to a single physical pixel so most benefits of high resolution rendering will be lost. In order for the HiDPI resolution to give any additional clarity to the image, you need to use it at a lower logical resolution than the native one.

More info on how scaling works: https://github.com/waydabber/BetterDisplay/wiki/MacOS-scaling,-HiDPI,-LoDPI-explanation