Bringing in a stacked texture? AO/roughness/metallic - what node to use?

[mikeluard]

I'm doing some texturing for an Unreal video game, we're using the packed texture method where the texture file has channels containing: R - AO G - Roughness B - Metallic

What node do I need to run these through to get them understood by Max? I tried out various RGB nodes and the OSL: Bitmap Lookup (which looked like it was going to work) but can't figure this one out.

[mikeluard]

I tried loads of different nodes and may have got it, under: 'Maps, OSL, Math, Color components'. It seems to work. 

Does anyone know if this is correct or perhaps there's a more simple way of doing it?

[CiroCardoso3v]

Yes, that is the correct way to do it. One image comes in, and you split the channels into different outputs.