Stretching/Crunching Heightmaps?

[Kastle117]

Hey folks, apparently all my other threads disappeared so that's a thing...
But anyways, I was having a go at terrain.party and downloading some heightmaps. The Tetons in Wyoming are great! But on another note, I started watching PUBG lately and wondered how hard it would be to make the map. So I searched for a greyscale map and found one and imported it into the editor and it looked good. There's just one problem for me, although the map did look good, it wasn't to scale from PUBG, since their map is only 8km x 8km (64^2 km) and our map is technically 81^2km, the map got blown up to size. So I was wondering if there is some kind of greyscale heightmap editor that will let me shrink the island back down to 64^2km, which shouldn't take up all 25 city tiles.

If you don't quite understand the size comparisons of our maps, just look up the map for PUBG. Our editing area for all maps is 81 sq km, and PUBG maps are 64 sq km.
I have attached the greyscale map for PUBG, Erangel.

 

[Fleetzpiepe]

I'm not sure about PUBG, but Cities:Skylines maps are ~18x18km in size. One tile is ~2x2km (1920m) and we have 9x9 tiles on a map.

To fit your 8x8km map into C:S you have to extend it by 5km in each direction. There are several ways to do this. I don't know any special program for this task (exept Wilbur, which may help you terraforming), but you can do this in any image software.

Paint the new surrounding area with a grey that matches your average height on the source map and do the final landscaping in the map editor.
Or do the landscaping directly in your image program.

If i remember correctly the grey values for the height reaching from 0 to 1023 (or 1 to 1024) and the image size of the heightmap is something around 8192 (please check the terrain.party output maps for exact value).

 

[Kastle117]

Thanks for the input. I’m not sure if I’m reading you right or if you read my message right lol. I know that the pubg map is much smaller than skylines. I already went ahead and imported the height map and it filled all 81 tiles no problem. But I still want to keep the scale the same, so I actually need to shrink the pubg map by adding more greyspace around the original file. I guess I was mainly asking of what programs could let me do that by “stretching” greyspace out from the original file to make it “bigger”.
It’s like when you go to terrain.party and instead of importing a 18x18km area, you import a 24x24km area. The land “shrinks” in size, that’s basically all I want to do, but you know Erangel is a fictional place so I can’t import it.

 

[Fleetzpiepe]

But I still want to keep the scale the same, so I actually need to shrink the pubg map by adding more greyspace around the original file.

That's exactly what i suggested.
Just load any of the terrain.party maps into your image program (so you have the correct resolution), clear it or fill it with grey and then paste the PUBG map in the center.
The size of the area where you paste it in has to be ~8/18 of the final map resolution.
Now you should have an image with your PUBG map in the center, surrounded by a grey area. "Sculp" the grey area with a brush or sth. in your image program or do it in the map editor ingame.
Hope that's clear enough. If not just ask again.

 

[Kastle117]

That's exactly what i suggested.
Just load any of the terrain.party maps into your image program (so you have the correct resolution), clear it or fill it with grey and then paste the PUBG map in the center.
The size of the area where you paste it in has to be ~8/18 of the final map resolution.
Now you should have an image with your PUBG map in the center, surrounded by a grey area. "Sculp" the grey area with a brush or sth. in your image program or do it in the map editor ingame.
Hope that's clear enough. If not just ask again.

Lol. Thanks dude. That should help! Now go make your own maps from other games!

 

[Mister X]

Watch out though: Wilbur has no sense of scale whatsoever, so it will make really narrow canyons all over the map if you use the erode tool, and it will vertically stretch it, so it looks nice on image but unplayable in game