Rock 3
Rock 3 is a procedural world generator to build believable and interesting earth-like worlds. By modeling tectonics and climate it drastically simplifies the process of building detailed and realistic biomes across continents and islands, while providing the controls you need to fine-tune and customize near-infinite possible planets. Save your worlds as equirectangular projections of biomes, elevation, heightmap, heat, water, and landmasses.
Rock 3 generates planets entirely on your GPU. It’s not recommended to run this on a laptop or other device with integrated graphics. Your experience may also be compromised on an old or low-end graphics card. In some cases scaling the resolution of the planet down can improve performance to usable levels. Maps are always saved at the highest resolution.
Game Discussion
Steam User 11
Very cool work. The negative reviews are clearly from before the tectonics update. I still consider them overly harsh, as the game is free. The dev has got to put up a patreon or something!
Steam User 7
This new tectonics update has made Rock 3 the best map generator/simulator avaliable by FAR. Seriously insane that it's free.
Steam User 3
This is a quite useful and extremely interesting piece of software. I wish we had more control over the design of the world map, though. It would also be nice to have a display showing the time period of possible eras. Perhaps it would also make sense to be able to upload height maps that you have created yourself into the software and then modify them using the sliders. The function that allows you to drag and rotate the map to the desired position is useful and effective; however, I would like the program to save the map in the desired position instead of automatically re-centering it. I would also appreciate having more control over the sliders. Ultimately, this is the best software for generating believable world maps. I have never used a program that delivers such accurate results. I am absolutely thrilled. Thanks!
Steam User 3
genuinely the best map/world generator available anywhere. I would've bought this if this wasn't free.
Steam User 2
It's great for free! Should be even better when the tectonics update goes live.
EDIT: Is even better!
Steam User 1
An excellent tool for creating and modifying worlds. One sore point: the sidereal year, at 25% makes the northern hemisphere warmer, and at 75% the southern hemisphere is warmer; however, when viewing the globe, at 25% the arctic is experiencing polar night, and the antarctic the midnight sun, and vice versa at 75%. I believe this is some sort of bug.
Steam User 2
This is possibly one of, if not, the best tools ive used for worldbuilding.