Disney use PTEX painted using their own in-house texturing system called Paint3D. Pixar use Mari with UDIM and PTEX layouts. Dreamworks and Sony Imageworks use Mari with UDIM layouts, ( as do Weta, ILM, Framestore, DNeg, MPC, Cinesite, Blizzard Cinematics, Blur, MPC) Their UDIM layouts can run into many hundreds of patches…