Exporting textures with multiple material IDs as one

[Sarah22050641s2a1]

Heya, as I've stated in the title, I'm wondering if its possible for me to export the texture files for each material as one texture sheet? 

I had a friend tell me its not possible and to do it in Photoshop, but surely not.

Below are the material ID's and their own seperate textures, if it helps. Everything is unwrapped, and one one UVW sheet too. 

[davescm]

Not directly in Substance Painter.

There is a Substance tool for use in Substance Designer that can combine up to five texture sets (actually the SBS is provided so that you can add further sets)

https://share-legacy.substance3d.com/libraries/2325

Note though that to use it you will need :

1. An export that includes an Opacity channel as an Alpha in the Base Color export

2. Each Texture set to have an opacity fill layer at the bottom of the layer stack with only opacity turned on and opacity set to '1'

3. Dilation set to 'Dilation +Transparent'

Dave