So question: I started a map using an imported heightmap. I want the sea level to be 0.5 like usual, but it seems my heightmap is slightly off having sea level at 0.509 how can I just slightly adjust this either by lowering a thin layer or by normalizing with some weird settings?
Hey there! There are a few solutions. The easiest is probably to take the Leveller tool, set the Blend Mode to Divide, then set the Value to 1.018 - that should squash everything down so that everything at 0.509 becomes 0.5. Either that, or you can just adjust your gradient so that the ocean colours start slightly higher. If you're using water maps, you could also simply fill your water table slightly higher so the water appears in the right place.