Possible to convert two smart layers into a single Smart Layer?

[planet88]

Hi there,

I have a greeting card mockup that has two Smart Layers (left side, right side)

Is it possible to merge/combine the two, into one single Smart Layer so I can insert my artwork as one single image file (instead of doing one side at a time?) 

Many thanks

[c.pfaffenbichler]

In the current setup you would have to amend the transformation of the instances and add Layer Masks (or Vector Masks), but it is possible in principle. 

Edit: 

[JJMack]

You can however two smart object were used most likely so you can  replace the two surfaces  with different images  each to be distorted into the proper perspective for the object use in the template.   That will be possible with one smart object.  However it will be difficult with a single object  single transform the warps the object image to the two surfaces .