GUI Filter slider has no discernable effect on game.

[RedRoryOTheGlen]

When changing the value of the GUI Filter slider in the Advanced Settings, there seems to be nothing visibly changing in the game. The expected behavior is for GUI textures like menus or message boxes to become slightly blurred due to Bilinear or Trilinear filtering. Instead everything is sharp as with a Point filter.

WilhelmBlack brought it up and I did some digging and it seems like the GUIFilterMode property in SettingsManager is only ever referenced in the following places:

• the same file
• in DaggerfallAdvancedSettingsWindow, allowing the player the set the value
• in HUDCompass, when loading the defaultTrackingIcon
• in TextureReplacement inside a method that is obsolete according to comments

I suppose this was simply left over from when DFU was rendering GUI differently.

Conversely, DaggerfallUI contains the GlobalFilterMode public property. It is just initialized as Point and there is currently no way for a player to change its value. Changing its value through a mod shows it affects windows and message boxes as expected. It would probably be a good fit to redirect the slider to change this property instead.