Renderscalex (Slash Command)

Slash Command

/renderscalex

Changes the horizontal scale at which the 3D world is rendered relative to your screen size

1.0 = 100% The default size and resolution of your screen
Use the /userenderscalex 1 command first to enable 3D resolution scaling.
This command alters the 3D Resolution Scaling slider in Options--> Graphics and Audio tab.

This command does the same thing as /renderscale except it only adjusts the resolution for the horizontal or X-axis of the screen.

The command can be made more or less permanent by running it automatically at log-in as a Command Line Parameter. For example,
-renderscalex 0.5

/renderscalex 0.5