How to convert an obj/mesh terrain to a heightmap?

[efeozyer]

Hello guys, you have done an amazing job so far. I really appreciate it. I have an environment design in Blender. I want to import it into Godot and use Terrain3D to extend/edit the existing design.

I believe it will be an amazing feature to provide. People will be able to bring their resources, and that will unlock huge possibilities.
Technically, I'm unsure if it's doable, but I wanted to discuss it at least.

What do you think?

[TokisanGames]

I have an environment design in Blender. I want to import it into Godot and use Terrain3D to extend/edit the existing design.

How did you construct it? How do you intend to import it? You should read through our heightmap and import documentation.

[efeozyer]

I was using another old game engine and I want to migrate my game to Godot, that's the exact case actually. I have this in .obj format e.g. if I can import this .obj file it would be amazing.

example.zip

[TokisanGames]

You need a heightmap. An obj you can convert.

1. Import into Godot.
2. Size it as big as you want.
3. Write a simple script that creates an Image that matches the size of the terrain (eg 4096x4096), Format_RF.
4. Run a raycast on every position in a grid from (0,0), (0,1)... (1,1), (1,2), (1,3).... (4095, 4095). Assign that height to a Color.r, and set_pixel to assign it to the image.
5. Save the image to disk.
6. Import the heightmap into Terrain3D per our documentation.