Expected Behavior

Normal rendering

Actual Behavior

Insane world flickering

Reproduction Steps

Happens in any world or server when multidraw (GL 4.3) is used. Occurs in commit a2b25d813f88c0a5aef4369bbd1620775789d20d and later.

Attachments

System Information

• Java Version: 15.0.2.7 (also occurs in bundled java runtime)
• CPU: Intel(R) Core(TM) i5-1035G4 CPU @ 1.10GHz (8 CPUs), ~1.5GHz
• GPU: Intel(R) Iris(R) Plus Graphics

Most likely related to the change in Multidraw code made to workaround this issue on AMD drivers.
The only fix for now is to change your chunk renderer in the Advanced tab to Oneshot(GL 3.0) from Multidraw(4.3).

That's the issue with intel graphics drivers (Multidraw(4.3) is not supported)

Solution:

Select renderer Oneshot (GL 3.0)

#24