This resource pack is an add-on to the Loading Backgrounds mod. It includes many of my favourite HD pictures that myself have taken and collected over the years. The shaders used in these screenshots are Complementary Shaders and Euphoria Patches.
Heads up that these pictures aren't just generic ambient screenshots, some of them will have players since these are pictures that I have taken for memories. They still look awesome regardless.
The screenshots are not 4K because the mod downscales pictures to the set Minecraft resolution, which would make compressed images look just plain terrible. Between having 1080p pictures and a smaller zip file size and 4K pictures with at least 6x the size, having myself no way to even see the 4K resolution, I chose size efficiency.
You can check the Gallery up top for a preview of a couple.