Chunks don't load single core

Thank you for your report!
However, this issue has been temporarily closed as Awaiting Response

Could you please provide more details or/and media files. As such we have no repro of this issue.
Also, did this issue happened more than once?
Does this happen for specific world/realm/server? Or it happens on every newly created worlds?

Also, just a reminder, to make your bug report as effective as possible, please try and include the following steps to reproduce the problem:

Steps to Reproduce:
1.
2.
3.

Observed Results:
(Briefly describe what happens)

Expected Results:
(Briefly describe what should happen)

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Steps to Reproduce:
1. Go to the options.txt in the Minecraft folder.
2. Set gfx_multithreaded_renderer from 1 to 0 [gfx_multithreaded_renderer:0]
3. Start Minecraft and join any world/server.

Observed Results:
The world is now invisible/transparent.

Expected Results:
The world is now invisible/transparent.