Prevent vertical stripes in babylon mesh

[Ravi Kiran]

Hi,

 

I am trying to draw a mesh using a heightmap and its texture. The mesh is getting plotted, but I see vertical stripes in the structure drawn. The following image shows this:

Is there a way to prevent the stripes and just have the structure? I tried a number of options but wan't lucky enough to figure it out by myself.

Here is the demo I created on playground: https://playground.babylonjs.com/#2WFHNI

[Gijs]

Hi, you can lower the maxHeight parameter of CreateGroundFromHeightMap:

https://playground.babylonjs.com/#2WFHNI#1

[Ravi Kiran]

23 minutes ago, Gijs said:

Hi, you can lower the maxHeight parameter of CreateGroundFromHeightMap:

https://playground.babylonjs.com/#2WFHNI#1

Thanks, that reduces the height of the object drawn. I want the object to be floating at the specified height without the stripes. In my project, the heightmaps I receive are like rocky surfaces with their edges not touching the ground. For that I have to set a fixed height to the mesh, similar to the example I created but my users don't want to see the stripes.

[Guest]

Unfortunately the GroundMesh will generate triangles (hence the stripes).

Can you hand draw how you would like it to look like?

[Ravi Kiran]

Here are two sample images that show how the mesh looks. The first image clearly shows how the vertical stripes disturb actual color of the texture plotted.

I want the 3D structure to be visible without these stripes. Is there a way to achieve this?

[Guest]

I feel like you should not use GroundMesh for that but instead create your own mesh from the data you have

[Gijs]

You can modify BABYLON.VertexData.CreateGroundFromHeightMap to check if a point is in the transparent zone, and set the height to a custom value. If you set it to a special value you can recognize later, you can use that in the part where the indices are set, and correct one or two of the "transparent" vertices. An added bonus is that if all three vertices are "transparent", you can leave the triangle out completely (save on geometry)!

[Guest]

That could even be a good PR for the framework