Can I upload layered PSD files into Substance?

If you don't want to go the beta route, try installing 2020 of Photoshop...make it doesn't replace your current version

Hi @Katie24680392xo8x ! 

I think the easiest replacement may be the upcoming Substance integration in Photoshop.  It allows you to use Substance materials with lighting effects directly in Photoshop.  It's still in Beta right now, but if you're part of the Photoshop Beta group you'll have access, or coming soon.

https://twitter.com/Substance3D/status/1525155245768200195?s=20&t=2S8PoJVMqpIbTIx_CtTYgw

One thing though is that it uses "materials" not images.  So you may need to convert your wall papers into materials. You can do that either with Adobe Capture or Substance 3D Sampler.  I'm not the expert on either of those flows, but each app team/forum might be able to help with more details!

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You could potentially do this in Stager but I'm not sure it will be a great experience honestly...  I've mocked up a basic example of what that workflow might look like if I understand your use case.  Please excuse the poor results, I just did it super fast to illustrate the basics.

Step 1: Load your background photo into Stager.  Just drag-n-drop it into the canvas and it will create a 3D camera with the image assigned

2 - Add a plane object. 

3: Resize/rotate the plane to match the wall.  Without going into too much detail, you basicallly use the transform tool to move, rotate, and scale the plane so it covers the wall area.  May take a little getting familiar to the 3D controls for this but not too hard!

4 - Add your own image to the plane material.  Materials hold data like color, glossiness, metallic-ness, even displacement/height for things like bump effects can be created if you wanna get more advanced.  For simulating wall paper not sure how much you need, but you could do anything really.

5 - Edit your 3D scene to match the image lighting.  This is the part that would require a bit of adjusting light values, light positions.  You could also do things like add other 3D objects like shelves on the walls, etc.  Hard to describe without more info of what you'd be trying to do - but Stager is pretty unlimited with lighting and layout capabilities.  

Here's a simple example where I just masked the stripes roughness so part of it is glossy and part is rough.  Then I played with a few lighting settings like intensity, rotation, and size. 

6 - Render the result.  Should be pretty fast for something simple like this and it generates a multi-layer PSD:

7 - Open the image in Photoshop and mask the rendered wall to the area you want to show.  lol sorry again that my result is so awful, I didn't spend any time on actual masking or lighting matching here, just wanted to show you the jist of how it could potentially work.