Background to 3D tracks dissappear?

Grazie wrote on 6/29/2004, 6:14 AM
Ok . . . .

Track 1 Slideshow 3D perspective, continually zooming to come OUT from right to left - half way .. looks great

Track 2 Video of singer. 3D left hand edge fills top and bottom Perspective running from Left to Right into centre.

Both these tracks overlap somwhere in middle .. not a problem. In fact it looks rather good!

Now as you might imagine I've got some ugly black backgrounds - kinda shallow triangles above and below the "action". Areas ripe for having some further material - in this case a map and some wild African cloth material slowly paning and drifting about . .

Problem:

When I want to add this backgound material .. ie in the BLACK are/space behind the 2 now 3-D streams - that are working very well .. . . I add this "background" on say track 3 thinking that this material would show "behind" the 3-D work .. no . .. All I get is a black background. . .

However, if I then insert a "dummy" track inbetween 1 and 2 and stick in some solid media - blak - and lower the opacity to 0%, can now see the Backgorund on the now track 4 which I couldn't do before ..

Please explain?

Grazie

Comments

Grazie wrote on 6/29/2004, 10:12 PM
. .it had dropped to No.50 . . either I should take a "hint" or need to explain further . . . how do I say this ? H-E-L-P !

. .Grazie
farss wrote on 6/29/2004, 10:22 PM
Grazie,
it took me a while to even get my brain around what you're saying but I think I understand. Don't know the answer BUT why not look at how its done in the 3D box demo vegie?
It has all manner of things with 3D and a background (generated media) which I've replaced with something else when I was playing around with it.

Bob.
Grazie wrote on 6/29/2004, 10:49 PM
Thanks Bob,

Yes, it is very difficult to explain, but the backgorunds - THAT which is not 3-D - don't show. I CAN make them show by introducing a "dummy" track, fill it with some solid colour Media, reduce this same media to 0% THEN the backgrounds appear.

Bob, I think I'm "front and centre" on understanding the mechanics of 3-D . .it's jus this wierd requirement to get a backgopund to show when using 3-D . . . this isn't the case with "normal" 2-D work .. you can have stuff in or out of the effected areas and STILL have tracks way below this to SHOW up . . Unless I'm really doing something I shouldn't, 3-D appears to "need" to have somthing in an in-between track for backgrounds, lower down, to show up!

Bob, if you do understnad my ramblings,could you do a trest please . .just to know I aint loosing my marbles?

Anybody in the UK I could have a telecom/phonecall with 'em?

The ever grateful,

Grazie


.. ps, I'm being told I lost me marbles 3 weeks ago . .. hmm funny that, I don't remember a thing . . . well I wouldn't, would I 1

PeterWright wrote on 6/30/2004, 12:49 AM
May be a red herring, Grazie, but in the NAB demo clip (which SCVUG brought our way - I'm still grateful) ... Gary from Sony talks about the Setting in Track Motion which puts a Track into 3-D Space, and the effect this has - this may have a bearing on why you're not getting transparency without the dummy track.

I'll try and have another look at the demo.wmv later on in case it helps ...

Peter

Zulqar-Cheema wrote on 6/30/2004, 2:03 AM
Grazie can you drop the chroma key filter, on the clips, key on the background and see if that works.
farss wrote on 6/30/2004, 3:13 AM
There's a whole .veg file on this iste somewhere that does it all. Maybe the problem is that the way Grazie is doing it Vegas thinks his background is a child track and it's being moved with the other track and hence hidden behind the object in it.
One simple fix should be to render the first two tracks out uncompressed with alpha and then in a new project compsite that over the background. I know that doesn't explain what's happening but at least it's a start.

Like I said before though the sample .veg exlains it all.

Grazie, just emailed the file to you.

Bob.
epirb wrote on 6/30/2004, 4:25 AM
Grazie, sounds kinda similar to what I was talking about here
3D Confusion
what I found was to make the other 3D tracks children of either a blank top track, but still not sure why.
Grazie wrote on 6/30/2004, 7:05 AM
THANK YOU epirb! . . This confounding my logic .. It appears to against what I've learnt about having the "furthest track from the "viewer" at the lowest point on the tracks . .ie the higher the track number the furthest behind.

That is all nothing more nothing less . . . it is the logic which is breaking me, not the "how to" .. yeah?

Bob, did you email me? Just got back from running aropund London - THANK you .. as I say it's the "why is it?" rather than the "how to" . .

Grazie
farss wrote on 6/30/2004, 7:39 AM
Yes,
twas me who emailed the veg, I think there's a read me file that may be of some use as well. For certain it's not going to tell you the 'why' but by looking at how it does work against what you're doing that doesn't I thought you'd have a better chance to nut it out.
I've found that to be one of the best ways to work out how to do the more complex tricks in Vegas. I've made a lot of use of the Burning Tree veg from the Sundance site to see how to use displacement mapping in Vegas.
chaboud wrote on 7/1/2004, 11:45 AM
Just to let you all know (especially Grazie), this is likely not user error.

This bug was fixed for Vegas 5.0b.

Grazie, you were right to believe that a 2D track beneath two 3D tracks should show through in any transparent areas/holes left by the 3D tracks.

Download the 5.0b update and you should be all set.
epirb wrote on 7/1/2004, 2:09 PM
AHH the sweet smell of sucess! or a sucessful upgrade anyway.
jsut loaded 5.0b earlier this week, Grazie, the issue I was having (maybe yours too?)
well I saved that veg file back then, just loaded it into 5.0b
Fixed!!!
No need for the "children" to come out and play !!! tracks 1,2,3 all 3D and "angled" if you will. the 4th track a 2D and behold! it now shows underneath!!Thank God I dont have to rack my brain trying to understand the Quatum Physical Intercept Point 3D-atosis theory! : )
It was only a bug, Thanks Chaboud.
Grazie wrote on 7/2/2004, 10:05 AM
Thank you all very much! . .I wasn't loosing my marbles - yeah?

Sony . thanks .. I've downloaded V5b . .. waiting for a project "window" to do a total re-install . ..

Grazie