Observation

Snow covers are half transparent.

or see https://imgur.com/a/t2kwpDD

Note: The screenshot was taken with more mods enabled, but it can be reproduced with the minimum setup, below.

This does not happen with MineGate 1.1.1. Therefore, I assume MineGate must cause it.

Setup

• Minecraft 1.16.5
• Fabric API 0.34.2
• MineGate 1.1.2

Reproduction

Create a new world and look for snow covered mountains.

Thanks for your feedback.
Fixed in the new version. (MoreBlocks 1.1.3)