When using the Legacy Direct3D display driver with 3ds Max, this dialog lets you make some basic choices for setting up the driver. Further Legacy Direct3D configuration options are available from the Configure Direct3D dialog.
To switch to a different display driver when Legacy Direct3D is the active driver, click the Choose Driver button on the Viewports tab of the Preference Settings dialog, click Revert From Direct3D, and then choose the new driver from the Display Driver Selection dialog.
The default option is Hardware (HAL). The Software (RefRast) option is for use by software developers, and is unavailable unless the debug version of DirectX is installed in your system.
The default option is Release. The Debug option is for use by software developers, and is unavailable unless the debug version of DirectX is installed in your system.
Click to return to the Display Driver Selection dialog, which lets you choose a different driver.