With #4150 merged we have a new model format: glTF ! This should be a much easier and long-lived format than the old md5 one. There are still some bits of cleanup and bugs to fix. Not necessarily all needed as part of this issue and some bits might be worthwhile to split out

Some of the following checkboxes may be suitable Good First Issues for anybody with some

Modelled on OPENVDB_USE_BLOSC, it would be nice to introduce OPENVDB_USE_ZLIB that could be used to make the zlib compression library an optional dependency.

This should be added to the core library, the CMake build system and the OpenVDB Read SOP and should default to ON.

The CMakeLists files of this project is kinda messy, mostly due to my limited understanding of the topic.

So they definitely need to be cleaned up at some point

The file dialogs should get the ability to store bookmarks and maybe even to show the default folders of the OS (like Downloads, Pictures, ...)

The custom bookmarks should just be stored as a Cvar (see core/Var.h, or in-game-console command cvarlist) that is separated with ;