The original author of this piece is Discord@UTerli:

This is based on the KKS version but generally works for KK as well (with minor exceptions)
These tutorials are just my (UTerli's) opinion, so they might not absolutely correct. @Acezen reserves all the rights to interpret them.

AX_MMD's Note: This guide contains specific tips for the Az Standard Shader but is generally good info about textures that give more depth to your characters and outfits

Mods
Az Standard Shader
- get Standard v5 for your game (KK for regular and KKS for Sunshine)
- get the StandardMigrationToV5
Example Chara card
Discord #card-sharing
Example scene
Discord #scene-sharing

#1 Colors

#2 DrawnMap & NormalMap

AX_MMD's Note: If the model has a green like texture in DetailMask (most KK models do) replace it with a white PNG. The white part of the mask texture is to allow details from the NormalMapDetail texture in Az, black to hide, and you can control by how much to hide by adjusting the black opacity.
Example Az DetailMask to prevent NormalMapDetail from affecting nails, fingers, toes, nipples, and genitals:

You can use the original green Tex with DrawnMap but the result is often not great.

AX_MMD Note: The Az Standard Shader is expecting a DTX5 NormalMap to function properly (other shaders don't), but if you insist on using an sRGB or Normalized NormalMap (purple color) then enable UseBlueAsMaskForNormalMaps

#3 DetailMask & NormalMapDetails

#4 Glossiness & Metallic