primitiveDescriptions[0] = std::make_shared<MeshDesc>(MeshDesc(
    {
        uvector3{17624.99999998905, -8510.00401819123, 17830.90112057791}, uvector3{
17374.99999998905, -8510.00401819123, 17830.90112057791}, uvector3{
17374.99999998905, -8510.00401819123, 18408.25138976753}, uvector3{
17624.99999998905, -8510.00401819123, 18408.25138976753}, uvector3{
17624.99999998906, -3577.50000024273, 20678.68364311939}, uvector3{
17374.99999998906, -3577.50000024273, 20678.68364311939}, uvector3{
17374.99999998906, -3577.50000024273, 21256.03391230901}, uvector3{
17624.99999998906, -3577.50000024273, 21256.03391230901}
    },
    {0,1,2,3,0,1,5,4,1,2,6,5,2,3,7,6,3,0,4,7,4,5,6,7
 },
    {uvector2i{0, 4}, uvector2i{4, 4}, uvector2i{8, 4}, uvector2i{12, 4}, uvector2i{16, 4}, uvector2i{20, 4}}
));