Anisotropic Point vs Anisotropic Linear

[ELK]

I am playing with the MinMagFilter settings of UE4.
(Specifies the texture filter type when textures are minified or magnified by the GPU.)

By default the textures I am changing the setting of have a setting of
MinMagFilter=aniso,MipFilter=point

UE4 documentation states that this is "Anisotropic Point" filtering.

Based on the documentation changing "MinMagFilter=aniso,MipFilter=point" to "MinMagFilter=aniso" will make the textures "Anisotropic Linear" filtered.

My question is: What is Anisotropic Linear filtering? Is "anistropic linear filtering" anisotropic filtering with trilinear interpolation between mipmaps?

Wikipedia has this info on mipmaps
"texture in a space of 40×40 pixels, then either a scaled-up version of the 32×32 (without trilinear interpolation) or an interpolation of the 64×64 and the 32×32 mipmaps (with trilinear interpolation) would be used."

[ELK]

Can some people test this and tell me if they notice a visual difference?

open this file
ARK\ShooterGame\Saved\Config\WindowsNoEditor\Engine.ini

Add these lines
[SystemSettings]
TEXTUREGROUP_World=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_WorldNormalMap=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_WorldSpecular=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_Character=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_CharacterNormalMap=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_CharacterSpecular=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_Weapon=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_WeaponNormalMap=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_WeaponSpecular=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_Vehicle=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_VehicleNormalMap=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_VehicleSpecular=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_Cinematic=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_Effects=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=linear,MipFilter=point)
TEXTUREGROUP_Skybox=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_UI=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_Lightmap=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_Shadowmap=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=point,NumStreamedMips=3)
TEXTUREGROUP_RenderTarget=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_MobileFlattened=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)
TEXTUREGROUP_SourceRez=(MinLODSize=1,MaxLODSize=4096,LODBias=0,MinMagFilter=aniso)

The engine.ini in this folder has the highest priority in the hierarchy
https://docs.unrealengine.com/latest/INT/Programming/Basics/ConfigurationFiles/#filehierarchy

It is over riding the anisotropic point filtering in "ARK\Engine\Config\BaseEngine.ini" to anisotropic linear.
https://docs.unrealengine.com/latest/INT/Engine/Content/Types/Textures/SupportAndSettings/#texturegroupproperties