Hi Yelandkeil: Thank you very much.

I can also make stereoscopic subclips, but only with photographs, not with image sequences, nor with video files. Can you do it with videos and sequences of images? However, in vegas 13 I have no problem.

I have not tested it with image sequences yet. Pairing videos to 3d subclips is still possible in VP19. But when I create a new subclip from a stereoscopic event, it contains only one stream. This was already the case in MovieStudioPlatinum 12, my oldest reference.

I didn't have had VEGAS13.

But the question is, do you shoot the so called image sequences with two separate cameras?

Do you know how to import sequences into timeline?

My 4th example is video clips (left and right) from 2 camcorders for the spacetime 3D scene.

And be aware, pair the left+right clips is NOT create a subclip!

@matthias-krutz, not correct, but somewhat complicated.

You must redefine your subclip(s) from off to the original 3D-format. And that's it.

What you just suggested doesn't work for me. The subclip stays as Offline Medium. I regularly use L and R photo pairs, L and R video file pairs, and image sequence pairs to generate L and R videos, and of course Vegas works fine for me, but only in the version I had until now, which was vegas 13. In vegas 19, it only works perfectly for me with pairs of L and R photos, but in the case of sequences of L and R images, and when using L and R videos, when making the subclip stereoscopic, it remains offline, that is, without image.

...and image sequence pairs to generate L and R videos...

Could you teach me step by step how to do that? I mean GENERATE

The process is extremely simple: once you have the L and R photos, or the L and R image sequences, or the L and R videos on the timeline, just link each pair into a stereoscopic subclip. There's no more. Everything works correctly in Vegas 13 and partially, only for photos, in Vegas 19...

From here "once you have the L and R image sequences...pair/link to generate L and R videos..."

I repeat: Step by step please, e.g. where are the sequences locating...

Or do we have language difficulty?

Yes, I have difficulties with English... The point is that the operation to generate stereoscopic pairs in Vegas is very simple, so it is not possible to do it wrong, and it has also worked perfectly for me for many years in previous versions, Vegas 13 in particular. What is your version of Vegas? Can you try to make a stereoscopic subclip with a sequence of some frames? If it works for you, it means that the program works correctly and I would have to look for another problem related to the PC, Windows version....

A short example with 2 sequences, which I took one after the other with the same camera, shows that it also works with image sequences. This should also work with generated image sequences.

But why doesn't it work for you?

In this case, is it a sequence of images (a numbered series) or an individual image for each eye? The individual image L and R also works fine for me in Vegas 19, what doesn't work for me is the sequence of images (ie a numbered series)

They are each 50 still images that I imported as a sequence. There is one sequence for L and one for R.

@Yelandkeil Just tried again.

 A subclip from a 3D video must be manually reset to 3d - pair with the next stream. This should already be done by the program.
This is not possible with paired image sequences and also not with paired videos. Here the subclip contains only one stream. Then nothing can be set to 3D. This is not a big limitation for me, but you have to know it..

This should already be done by the program.

No, it is not Matroschka.

A subclip is quasi an "independent" also individual clip that exists "parallel" to the mother-clip so long as the mother-clip stays there.

You'd be happy that it still remembers the 2nd stream so that you can relink to pair both.

As for once already paired materials, that's too far for a subclip.

If you edit BlackMagic RAW material, any subclip lost the RAW characteristics because VEGAS has made a proxy from the RAW for your editing. The subclip comes from that proxy thus no chance to obtain the RAW characteristics again.

This means, do every color correcting/grading etc. as final and after create subclip you can change nothing any more.

Oh darn! I began losing my language logic.

@Yelandkeil If the parent clip already contains both streams and is not paired, as with the Fuji W3, for example, only then does the subclip also have 2 streams.
Why then should the subclip not take on this property as default?