FModel vs OpenMW-CS

FModel is free, open-source Windows software for exploring and extracting content from games made with Unreal Engine. It can browse game archives, including encrypted ones, and compare two archive states to identify new or modified packages; encrypted archives require an AES key. It parses more than 30 asset types, displays their properties and offers image, audio and 3D viewing for supported content. Package properties can be shown in formats including JSON, INI, XML and TXT, and models can be saved as PSK files. An Export Session window supports batching raw data, model, world, texture and animation exports. The August 2026 release added USD export for meshes, animations, materials and worlds, plus WebP export and texture quality settings. Whole-level export is in USDA format, and sockets or attachments may not always be placed correctly. FModel is distributed as a portable x64 executable in a ZIP archive. It requires .NET 10.0 or later, and some games may require up to 2 GB of free RAM.

OpenMW-CS is a free editor for making or changing mods and creating original games. Its editing tools cover files, world and mechanics data, characters, and assets, with record filters and a cell view. The editor supports plugin and script editing, mod packaging, and ESM, ESP, .omwgame, and .omwaddon formats. The project says OpenMW can run original games made with OpenMW-CS; those games do not require Morrowind. Playing Morrowind does require a legally owned copy, because OpenMW does not include its content or assets. Official releases are listed for Windows, macOS, and Linux, alongside distribution channels including Windows Chocolatey, Linux distribution repositories, and Flathub. The manual is intended as both an introduction and a reference, including for people familiar with Morrowind modding, but cautions that OpenMW-CS remains in development and the manual does not cover its shortcomings. Mods requiring MWSE, MGE XE, or MCP are incompatible because those tools modify the original Morrowind executable. The source code is released under the GNU General Public License version 3.