Feature request: support Pass Through Blending Mode for Smart Objects

Hm... To be more clear, the way I would do it is not to start with a (linked) S.O., but just open the helper file, paste my current (merged) view into it as its background, go through pre-made Layer Comps, copy the layers I picked, close helper doc w/o saving, paste layers in main doc.

For your Layer Comps to work well, you have to paste (or maybe merge down) to a pre-made background layer that was already included in the Comps, or they will just make your pasted layer invisible.

I'm all for it, but I suspect there must be a good reason for how it works now...

I remember the day I had the idea to also use a linked helper document with a lot of adjustment layer variations, for which I could pick the Layer Comps in my main document. Then I noticed it needs a base layer inside the Smart Object... 😞
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Another workaround is to copy your current (merge all) view into the Smart Object (helper doc) as the background layer, view stuff inside of it (like pre-made Layer Comps) , and have the preferred (adjustment) layers copied to your main file.

This is not really a linked Smart Object in the end (as we delete it), but can be a related method of using a pre-made helper file. I guess the advantage is that the layers will never change, as they are now copied into your main document. A negative, depending on your use, might be file size (for example, if your case would need copying over many texture layers) or if you want the layers to change when the master doc is changed. For just a few layers and mainly adjustments, copying is however no issue and can be a plus. But to do all of this in an effortless way, you have to have a head for scripting...

Here's a workaround, for anyone stumbling on this issue: make a PSD file for every layer in your folder, and use them as a linked smart object. Then for each linked smart object, you can choose the blending mode you want (multiply / overlay in my case).

If your goal was to decrease file size, it might not help though, because PS (frustratingly, and inexcusably imo), saves a copy of the render of the 'linked' smart object in the composite PSD. See this discussion.

Example images from my own PSD. First is the pass through folder with the desired look, second is the linked smart object