added safety checks for missing materials
added safety checks for missing materials

nakijun/vtp,nakijun/vtp,nakijun/vtp,nakijun/vtp,markraz/vtp,nakijun/vtp,seanisom/vtp,seanisom/vtp,seanisom/vtp,markraz/vtp,markraz/vtp,seanisom/vtp,markraz/vtp,markraz/vtp,seanisom/vtp