Here you can find information about Morrowind Screenshots project.
game engine and utilities
Preferably use the latest version of the OpenMW engine or the vanilla engine with MGE. You need to set high resolution and enable anti-aliasing. You can enable slight graphical enhancements, such as water shaders. You can increase the number of loadable cells in exteriors, but using distant land is not recommended. To take screenshots in the vanilla engine, use the "PrtScn" key, and in the OpenMW engine, use the "F12" key. To capture video, you can use screen capture programs such as OBS Studio.