public IEnumerator BuildColumn(int cx, int cz)
{
List3D <OpenCog.Map.OCChunk> chunks = map.GetChunks();
for (int cy = chunks.GetMinY(); cy < chunks.GetMaxY(); cy++)
{
OpenCog.Map.OCChunk chunk = map.GetChunk(new Vector3i(cx, cy, cz));
if (chunk != null)
{
chunk.GetChunkRendererInstance().SetDirty();
}
if (chunk != null)
{
yield return(null);
}
}
}