internal Vector2[] GetUv4(Mesh m)
            {
                MeshChannels mc;

                if (!meshID2MeshChannels.TryGetValue(m.GetInstanceID(), out mc))
                {
                    mc = new MeshChannels();
                    meshID2MeshChannels.Add(m.GetInstanceID(), mc);
                }
                if (mc.uv4 == null)
                {
                    mc.uv4 = MBVersion.GetMeshUV3orUV4(m, false, this.mc.LOG_LEVEL);
                }
                return(mc.uv4);
            }