What is a STEX file?
A STEX file is a Godot Engine StreamTexture File belonging to the raster group of images. When a user drags and drops an image onto the project asset in the Godot Engine, it results in resource formation in this format. The project copies the file, removes its existing extension and adds .STEX to it.
Godot Engine is a free and open-source game engine which is mostly employed for creating 2D and 3D games.
How to Open STEX Files
How to Make STEX Files
Exact steps for creating STEX files will vary by program and operating system. Download one of the above listed programs and you should be able to follow typical procedure for opening files or creating files from the File menu. Typically you will select File > Open or File > New and continue through the prompts. Some programs may follow a different procedure for either creation or opening of files.