If you haven't seen this already on our Discord server or Twitter, which if you haven't you definitely should join/follow us. With that plug out of the way, what you're seeing in these screenshots is NOT custom terrain. This is all ONE 8k texture on a single block. Yup, you read that correct, it's one single block creating this beautiful micro-world as I like to call it. This texture is applied to a scaled-up block model of lodestone to allow for better navigation and viewing of the texture.
To properly view this texture you'll need a shader that supports POM and labPBR, the one used in the screenshots seen here is Kappa made by RRe36 which can be found here. You'll need to increase the POM quality a lot to view the texture in its true glory. For Kappa, this can be done by navigating to the shader options, terrain, Parallax Mapping, and then setting the Iterations to the max. For the proper depth change, the slider below it to be 1.5 For Parallax Self-Shadowing turn it all the way to the max as well.
With all that explained you can download the Micro-World pack here. If you want to see more of these Micro-Worlds leave a comment or suggestion for new ones.