Gaea Heightmap to Unreal (scale height question)

Elowan

hi there,

as far as I remember, Unreal 4 landscape Z-Scale 100% = 512 units.
So for a terrain with max. 4096m, you would have to set the Z-scale in UE to 800 (8x512=4096) to get the height of the landscape right.

At least this was my workflow, going from WorldMachine to Unreal Engine 4.22

Now, as I use Gaea and UE 4.26.1 - does this "math" still hold up?
Looks like there is some difference, when calculating the right height-scale in UE.

I got a 4033x4033 heightmap imported.
The Gaea settings look like this:

So the terrain max height (Gaea) is 2250m - 100% Z-scale in UE means 512m or units (if this hasn´t changed)
Z-scale in UE has to be 2250 divided by 512 = 4.39.

Instead of Z-scale 100, this should be 100x4.39= 439 if I am not mistaken...

But at this scale, the terrain is way too flat - roughly eyeballing, the scale for Z in UE needs to be around 850
or something like this - to fit the proportions from Gaea viewport.

Is there a way to exactly calculate, how the Z-scale value in UE has to be set?

Cheers!

BrianG61

I have found in all my experiments going from Gaea to Unreal, that in UE4 while importing the terrain, changing the Z scale to 260 seems to always work. This seems to be true for both 2k and 4k terrains. I hope this helps a little.

Elowan

BrianG61 Hmmm - I think this depends on the terrain size as well? like the height to lenght ratio...

I am type of person who wants to work with precise values instead of much guesswork so... I hope for the devs to chime in some day - but they are pretty inactive and silent on the forums. At least regading my topics/posts