Scripted detaillayer prototypes won't show in build.

Hello there,

I've found an issue with the terrain detaillayers. Script-added detaillayer prototypes won't show in the windows build.

As a test i've created the detaillayers in following way:

1) Added detaillayer prototypes trough the terrain tools (both textures and vertex-lit).

2) Added detaillayer prototypes to the same terrain with the following script (snippet):

     DetailPrototype[] oldDetailPrototype = terrain.terrainData.detailPrototypes;
     DetailPrototype[] newDetailPrototype = new DetailPrototype[(terrain.terrainData.detailPrototypes.Count() + gameObjectList.Count())];
     int[] referencelist = new int[gameObjectList.Count()];
     
     for (int i=0;i<terrain.terrainData.detailPrototypes.Count();i++) {
         newDetailPrototype[i] = oldDetailPrototype[i];
     }
     
     int counter = 0;
     int j = terrain.terrainData.detailPrototypes.Count();
     foreach(GameObject obbie in gameObjectList) {
         DetailPrototype prototype = new DetailPrototype();
         prototype.prototype = obbie;
         prototype.dryColor = Color.black;
         prototype.healthyColor = Color.black;
         prototype.noiseSpread = 0.1f;
         prototype.renderMode = DetailRenderMode.VertexLit;
         prototype.usePrototypeMesh = true;
         prototype.minWidth = 0.75f; 
         prototype.maxWidth = 1.0f;
         prototype.minHeight = 0.75f;
         prototype.maxHeight = 1.0f;
         newDetailPrototype[j] = prototype; 
         referencelist[counter] = j;
         j++;
         counter++;
     }
     
     terrain.terrainData.detailPrototypes = newDetailPrototype;
     terrain.terrainData.RefreshPrototypes();
     terrain.Flush();

3) Both the tool-added and the script-added detail prototypes are then assigned trough a script to the detaillayers.

4) In the Unity editor both the tool-added and the script-added details appear on the terrain on runtime.

5) In a build only the tool-added details appear on the terrain on runtime

The runtime error log shows no errors or notices regarding t$$anonymous$$s what so ever. Adding the prefabs in the resource folder makes no difference.

Do you have any idea why t$$anonymous$$s issue appears? And do you have a possible solution for t$$anonymous$$s?

Thanks in advance!