Ah yes I think that's what I meant haha, my bad, that's what it seems to be, thanks!
For anyone that stumbles across this in the future, make sure you export the maps to XML using the Lucas Pure 3D Editor, not OBJ otherwise the vertext paint data won't be included in the models.
In order to use both the vertex paint information and the textures, use these nodes and settings in the shader editor tab, this is what seems to be most game accurate. (unfortunately you'll have to do this for *every* object in the scene...
Nodes used: (image texture) > Vertex Color > MixRGB > Principled BSDF > Material Output
I recommend setting these nodes up for the first object, then copying the Vertex Color, MixRGB, Principled BSDF and Material Output nodes. Then move onto the next object and remove the P BSDF & Material Output nodes, then paste the copied nodes from the previous object, then all you have to do is connect the Texture to the MixRGB node and you'll be sorted. Rinse and repeat for every object in the scene :)
Hope this helps anyone that needs this info in the future!