Errors while Generating Terrain in batchmode/headless

hi there.

Im using MapMagic2 to generate some terrains. Everything works fine in a normal stand alone.

However when launching the application with the -batchmode arugument, to run the application in dedicated server mode, im given errors while generating the terrain

Specifically on
data.CopyActiveRenderTextureToHeightmap(rect, rect.min, TerrainHeightmapSyncControl.None);

this throws a "ActiveRenderTexture is null" most likley because its running without graphics and such so this happens.... i also get some other errors that i havent tracked down yet but... maybe some one might know where to start, so ive included them:

ArgumentException: Kernel 'MergedInstancedIndirectBuffers' not found


I feel i am missing somthing, like there is another method of doing this in a non-graphics enviroment,


I also notice that unity isnt printing the logs out to the AppData/LocalLow/<Project>/ Directory area that a stand alone normally does. Why not? and can i turn it on?

Thanks


on second look im noticing in the MapMagic Code he is using Graphics.Blit() to do somthing and then sets renTex as the Render Texture... i assume this is returning null because its using the Graphics namespace/class? and its running in headless? not sure.. heres the snippit of code.... any help is appreciated

Code (CSharp):

1. if (terrain==null || terrain.Equals(null) || terrain.terrainData==null) yield break; //chunk removed during apply
2.                 TerrainData data = terrain.terrainData;
3.  
4.                 Profiler.BeginSample("PrepareTexApply");
5.                 RectInt texRect = new RectInt(0,0,res,res);
6.  
7.                 if (tempTex == null ||  tempTex.width != res)
8.                     tempTex = new Texture2D(res, res, TextureFormat.RFloat, mipChain:false, linear:true);
9.                 Profiler.BeginSample("Load Tex");
10.                 tempTex.LoadRawTextureData(texBytes);
11.                 tempTex.Apply(updateMipmaps:false);
12.                 Profiler.EndSample();
13.  
14.                 if (renTex == null ||  renTex.width != res)
15.                 #if UNITY_2019_2_OR_NEWER
16.                     renTex = new RenderTexture(res,res,32, RenderTextureFormat.RFloat, mipCount:0);
17.                 #else
18.                     renTex = new RenderTexture(res,res,32, RenderTextureFormat.RFloat);
19.                 #endif
20.                    
21.                 Profiler.BeginSample("Blit Tex");
22.                 Graphics.Blit(tempTex, renTex);
23.                 Profiler.EndSample();
24.  
25.                 //no resize algorithm
26.                 Profiler.BeginSample("Change Res");
27.                 Vector3 terrainSize = data.size;
28.                 //data.heightmapResolution = res;
29.                 data.size = new Vector3(terrainSize.x, height, terrainSize.z);
30.                 ApplySplitData.FastHeightmapResize(terrain, res, new Vector3(terrainSize.x, height, terrainSize.z));
31.                 terrain.groupingID = res;
32.                 Profiler.EndSample();
33.  
34.                 //splitting in parts
35.                 int numSplits = (int)(res/splitSize);
36.                 if (numSplits*splitSize < res) numSplits++;
37.                 Profiler.EndSample();
38.  
39.                 for (int sx = 0; sx<numSplits; sx++)
40.                     for (int sz = 0; sz<numSplits; sz++)
41.                     {
42.                         Profiler.BeginSample("Apply Heightmap");
43.  
44.                         Profiler.BeginSample("Set active rendertex");
45.                         RenderTexture bacRenTex = RenderTexture.active;
46.                         RenderTexture.active = renTex;
47.                         Profiler.EndSample();
48.  
49.                         RectInt rect = new RectInt(sx*splitSize, sz*splitSize, splitSize, splitSize);
50.                         rect.xMax = Mathf.Min(rect.xMax, res);
51.                         rect.yMax = Mathf.Min(rect.yMax, res);
52.  
53.                        
54.  
55.                        
56.                             Profiler.BeginSample("Copy to heightmap");
57.                             data.CopyActiveRenderTextureToHeightmap(rect, rect.min, TerrainHeightmapSyncControl.None);
58.                             Profiler.EndSample();
59.