G.E.C.K.2: BETHESDA HAS REWROTE THE RENDERER, FALLOUT 4 HAS PHYSICAL-BASED RENDERING ENABLED, DIRECTX 11 SUPPORT, GOD RAYS, 64 BIT SUPPORT, AND MUCH BETTER COLLISION AND MESH MECHANICS; CREATION KIT: BETHESDA HAS REWROTE THE RENDERER, SKYRIM REWRITES THE SCRIPTING TO USE PAPYRUS, ADDS SHADER MODEL 3 SUPPORT, PROPER OCCLUSION CULLING, AND A FEW OTHER BITS; G.E.C.K: UPDATES TO CORE SCRIPTING AND ANIMATIONS AS WELL AS ADDING MULTIPLE NEW PLUGINS TO MANAGE SUBSYSTEMS, 3D PREVIEW WINDOW, QUEST OBJECTIVES; CONSTRUCTION ENGINE: BETHESDA HAS COMPLETELY REWROTE THE RENDERER WITH OBLIVION ADDING SHADER MODEL 2 SUPPORT, THE FIRST ITERATION OF DISTANT LAND, AND SCHEDULED NPC SCRIPTING; NUMERICAL DESIGN LIMITED WAS FOUNDED IN 1983, MOSTLY DOING CONTRACT WORK FOR GOVERNMENT AND CAD CLIENTS IN THE COMPUTER GRAPHICS SECTOR, THIS WORK LED TO THE PRODUCTION OF THE NETIMMERSE GAME ENGINE IN 1997 PHYSICS TIED TO FPS