I’ve got a height map that I’ve previously gaussian blurred in gimp, but it still wasn’t enough to get rid of the ridges after import. The blur tool in UE5 would take forever to do an 8km^2 map so I was wondering if anyone had a trick up their sleeve?
Let me know if I posted this in the wrong spot or if I am asking a silly question.
I was asking me the same (Even if it was not for the same issue)
And before to make some critics toward Unreal I still First want to Thank Epic because everything is Free, far from perfect But we can all enjoy it and experiment as much as we want thank to them.
Still that me who did deep studies in much more complicate than Gaming (And also heavily used some professional Stuff like SolidWorks) I’m always surprise how most of engine Work. We can see they have been though (The core) Decades ago and was first plan for 2D and not for 3D. And here with the HeightMap (HM) is typically the kind of situation where I’m wandering what’s going on.
Still your problem Might be due to several things at the same time (And I hope I help all those who found this topic like me).
- First of all make sure that your PNG is really a GRADIENT (Smooth edge when there is Height change). It should not have noise (Except if Needed) and shade/grade transition should not be “sharpen”
Then there is 3 way (According what I found) to bring a new heightmap (And 2 Ways if you want several/Multiple heightmaps )
A) Landscape Mode > Manage > Import
1) You Pick the Current Layer and import a new One; “Import Type”: “Original” (Be carefull if you don’t pick “Original” you may have the problem mentioned above because UE will try to scale It). Still that with this technic you can only have 1 HM
2a) You go to the same place but First of all under: Edit Layers > Create a new Layer; This time when you will import you will have a Second HM in parallel of the first one.
But How the Freak do you make them cohabit/coexist smoothly ? (Here is the most Important if you want A Great Field)
Landscape Mode > Sculpt (Just To the Right of manage)
2b) You go to the Bottom, in the Edit Layers section you will see “Alpha” for each layer from here it up to you to find the right Amount and find the right balance between smoothness and relief
B) Landscape Mode > Manage > New
Maybe More Tricky but You can also Create a New landscape.
3a) (Depend your Situation but it may help to have AlphaMap Type: “Layered” ) Create you new landscape (LS) with your HM, pick the setting you want (Based on my test The number of Component doesn’t seems to have any kind of impact on the relief, so try to keep it low, because more you have component less performance will be good).
3b) From now You can go on the right, in the “outliner” Panel. Pick your New landscape which should be “Landscape2”. Inside “Details” Panel, In the “Location” Entry you can adjust the Position Z of your New LS (And the other too). Depending what you need, increasing/Decreasing it, it will allow you to have the Current LS go through the Other LS and mix their HM.
This Third Technic is more odd but it may help in some circumstancies.
Lastly but not Least, Inside the “Details” Panel, Under “Location” you have the “Scale”, more you will decrease it smoother should be everything, at the opposite if you increase it, you will get sharpen Canyon
Still that all of this is really hazardous and we can not (According what I found), set precise Location for Layers (Which is really annoying) but have to place them manually. We can not rework procedurally the Field so your HM have to be Perfect (Which is far to be easy), And we can not set any kind of parameter for the HM (Max Height, Min Height, Max Slope …) which make it even more Odd.
The component and other being not worth … So again as said UE is Free I suppose it’s partially normal to have such caveat (And we have a well furnished Marketplace), but still it seems that a lot of thing have been though “topsy-turvy”. Kind of Goblin way of Working XD.
I have the same problem in UE 5.5.
My heightmap image resolution is 8192x8192, and I tried both 8-bit and 16-bit grayscale.
If I import the heightmap into an external tool like TerreSculptor 2.0 it looks fine, no layered bumps like in your image, but when I import the file using Landscape mode, I get the same type of bumps no matter the settings.