[Solved] SMAA + some Ureal Engine games (back buffer format is not RGBA8)

Some UE games make use of greater color depth, so I get this warning in such cases:

Despite that, Edge Detection actually works with all Types (with correct RESHADE_DEPTH_ settings for Depth).
As seen in Statistics:

So I wonder what exactly happening in such case.
Does SMAA reads "unsupported" format, but uses lower color depth - e.g. approximation and hence mismatch\inaccuracy?
There's also Luminance Edge Detection Type - i guess it's BW\Grayscale by content anyway. So, will it work as intended, just somewhat inaccurate?

I guess Depth Type uses ReShade's "Generic Depth" Add-on and texture doesn't matter in this case. Is that so?
However, it's not much of use , since so many details absent.
So, I'm more interested in use of Luminance if it's less inaccurate or Color if it works acceptable.
Subjectively both of it looks wrong, not good at all... Just stick with SMAA off for such games?
BTW, Ghostrunner is just for example, as it's currently installed - I don't think it really needs SMAA (that much).

Got my answer on ReShade Discord server, if anyone interested:

LVutner Today at 11:45 AM
—

its all in smaa header.
```
* - Depth edge detection is usually the fastest but it may miss some edges.
*
* - Luma edge detection is usually more expensive than depth edge detection,
* but catches visible edges that depth edge detection can miss.
*
* - Color edge detection is usually the most expensive one but catches
* chroma-only edges.
```
* 5. All texture reads and buffer writes must be non-sRGB, with the exception
* of the input read and the output write in
* 'SMAANeighborhoodBlending' (and only in this pass!). If sRGB reads in
* this last pass are not possible, the technique will work anyway, but
* will perform antialiasing in gamma space.
```
* IMPORTANT: for best results the input read for the color/luma edge
* detection should *NOT* be sRGB.