type gfxlightmaparray [display="GFX Lightmap Array"]
{
  i32 primary_ptr [ui, readonly, display="Primary Ptr"];
  i32 secondary_ptr [ui, readonly, display="Secondary Ptr"];
  
  // Images parsed inline if ptr == -1
  if (primary_ptr == -1) {
    primary = parse_here("image");
  }
  if (secondary_ptr == -1) {
    secondary = parse_here("image");
  }
}