Still present in 1.21-pre2 :/
A lot of my friends seem to have this issue in 1.7 versions, but not in 1.8 and higher. A lot of them have Intel or AMD GPUs and iGPUs too. But they have the exact same rendering issue as shown in the screenshots. Is there a fix for that?
As I said before, my PC is bad, but it was enough to play Minecraft 1.14.4 at decent framerates.
CPU: AMD A4-3300
GPU: Radeon HD 6410D (Latest driver)
RAM: 8 GB dual channel
1366x768 screen
Windows 10 Pro x64
As for my game settings, I've tried using the same ones I've been using on 1.14.4 (6 render distance, fancy graphics) and that gave me 2 fps in the overworld. Using the lowest settings possible (without lowering the resolution) i get a max of 20 fps.
I'm having the exact same issue. My computer is not that good tho, but I get ~150/200 fps on 1.14.4 but on Minecraft 1.15 I get (no kidding) 2 fps with the same settings, java arguments etc. It's literally unplayable.
Still present in 1.21-pre4. Starting to think this won't get fixed for 1.21.