Installation instructions for The Reach Interstellar:

These instructions are for installing the planet pack The Reach Interstellar 1.0.1, currently for KSP version 1.8.1

Please notice ===> The Reach Interstellar is not tested to work with other planet mods, but is meant to be. Please report any compatibility errors on the forum thread!

1 - Drag and drop the "TRI" folder to your "KerbalSpaceProgram/GameData" folder.
2 - Download and install Kopernicus - https://github.com/Kopernicus/Kopernicus/releases/download/release-1.7.1-4/Kopernicus-1.7.1-4.zip
3 - [OPTIONAL] Download and install Scatterer - https://github.com/LGhassen/Scatterer/releases/download/0.053/Scatterer0.053.zip
4 - [OPTIONAL] Download and install EVE - https://github.com/WazWaz/EnvironmentalVisualEnhancements/releases/download/EVE-1.4.2-2/EnvironmentalVisualEnhancements-1.4.2.2.zip
5 - Enjoy, or else...

6 - Present in the GameData/TRI/EVE/Atmosphere/Textures folder are two variants for the clouds of Liquen; a swirly one, and the rough one.
To use the swirly edition, simply rename the file Liquen2.png to Liquen1.png, and make sure the original Liquen1.png has a different name.