Gaius Armour and the Mobile Version.

[Valence]

Generally you need an ID texture map to translate material IDs (which are mesh related) into UV texturing (which is texture related). You're colouring a texture, not a mesh material.
You can ofc automate and bake out ID maps for each 3D item but you'd still need to:

1) check them manually and see if every channel works because no, colour theory is more complicated than snapping your fingers and the colour suddenly turns from red to green (especially in relation to dark and light, a lot of parts of gear probably wouldn't work well with colour transition so you'd need to exclude them out).
2) have your 3D items actually make use of those ID materials, some may not have a lot of IDs set, and in order to fix this you'd need to manually go over every piece of gear one by one, which I suspect is the reason for the slow transition to the 2 dyes channel system (but I could be wrong).

If mobile ARR is doing this then this raises questions to where they actually dedicate their graphic pipeline resources.

[CalvinDescoles]

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If mobile ARR is doing this then this raises questions to where they actually dedicate their graphic pipeline resources.

To an other game