private UUID ExtractMaterial(Guid matId, RenderMaterials mats)
        {
            byte[] osdBlob = m_assetResolver.ResolveAsset(matId);
            if (osdBlob != null)
            {
                OSD osd = OSDParser.DeserializeLLSDXml(osdBlob);
                return mats.AddMaterial(RenderMaterial.FromOSD(osd));
            }

            return UUID.Zero;
        }