The dgVoodoo wrapper, unlike nGlide, allows for enabling translucency effects, anisotropic filtering and antialiasing.
This happens only in native Direct3D mode.
The version of nGlide (the Glide wrapper) that comes with Outlaws is outdated.
These features of the game require software rendering mode.
The Windows mouse pointer (or the blue, "working" circle) briefly flashes on screen while playing.
Enabling A3D audio adds some environmental audio effects
Using software rendering restores the game's original, full-sized HUD (with the gold bar along the bottom) and sepia effects.
Patched re-releases of the game allow software rendering only in windowed mode. The instructions below allow it in fullscreen.