Minecraft version
Which Minecraft version are you playing on?
1.16.3

Mod version and malilib version
Which exact mod version are you using? Include the full mod file name which includes the build date and time for the development versions, or you can see the mod version in the title of the Litematica main menu.
"Latest" is not a version!! It's ambiguous, it's a moving target, and very often the version is not actually even the latest available version at that time.

• malilib-fabric-1.16.3-0.10.0-dev.21+arne.1.jar
• minihud-fabric-1.16.3-0.19.0-dev.20200912.222204.jar
• litematica-fabric-1.16.3-0.0.0-dev.20200920.161640.jar

Description of the bug
Strange rendering errors when loading a schematic into a world. See the images from the google drive link.

Expected behavior (if not clear from the description)
It should render the schematic without crazy visual glitches

To Reproduce (if not clear from the description already)
Steps to reproduce the behavior:

1. Load a schematic in 1.16.3
2. Observe

Screenshots
https://drive.google.com/drive/folders/1YrXyiLt1Ar3jCBNOfAvlT82w851TgaGG?usp=sharing

Additional context
This is on a BSkyBlock world running BentoBox on a Sigot SMP Bungee Server.

Turning shaders off can help.

I'm not using shaders.

The rendering looks exactly like the issues that the changed vertex format from shaders causes. Check that you have shaders set to OFF instead of Internal. Or another thing that might fix it is disabling the Render Regions option. You will probably need to at least re-log or even restart the game after disabling the option(s).

That fixed it!