Terrain Sculpting lowering problem
For some reason I'm unable to sculpt terrain below a certain height. I imported a height map and am able to sculpt normally but their seems to be a plane that I can't sculpt the terrain below. I'm trying to create a valley in my terrain but it won't let me sculpt below this floor and when I attempt to go below this everything just flattens. I'm using Unreal 4.8.3. Also the sculpt visibility brush doesn't work.
asked Oct 15 '15 at 01:56 PM in Using UE4
For the first question, you're probably hitting the lower limit of the landscape resolution, you'll need to increase your landscape scale. Or, if your landscape is all quite low, you could use a large component brush to raise the entire landscape, which would then allow you to sculpt down further.
Landscape uses a 16-bit heightmap, so the raw height values range from 0 to 65535. It is offset so that half the range is above the landscape origin and half below. It then divides by 128 and multiplies by the landscape scale (default 100) to get world coordinates. This by default gives a sculpting range of approx -256m to +256m with a vertical resolution of ~0.78cm. If you need more height range than that, you will need to use a higher Z scale on your landscape, but it will proportionally reduce the vertical resolution. For example doubling your Z scale so that you can get a -512 - +512 metre range will reduce your vertical resolution to ~1.56cm.
For visibility to work, you need to connect a "landscape visibility" material node to the "opacity mask" output of your material. The default world material used when you don't have a landscape material defined doesn't have this, so it won't work if you don't explicitly create and set a material on the landscape.
answered Oct 19 '15 at 11:30 AM
hey i know this is pretty old but can still be an issue.
my quick tipp for a fix. you can use the "CopyPaste Landscape" tool. select your hole landscape with Section Tool. Fill out the Gizmo to complete Landscape and paste it up (about 5.000 units, or what you need). then hole landscape goes up at onces and you can sculpt back down again.
to get the gizmo brush working, you need to select Copy/Paste and Gizmo Brush. (For Gizmo Brush the Circle is selected on standard. so you need to switch that button first, otherwise the gizmo copy paste will not work).
answered Jun 13 '19 at 11:17 AM
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