How to avoid LUT on a track above to affect track below

Martin L wrote on 2/28/2018, 5:53 AM

Hi!

I have trouble with a strange behaviour in Vegas Pro 15. If I have a LUT, or any other effect, applied to e.g. track #1, that LUT's effect will be applied to all tracks under. But only when there is an event on track #1. When there is no event there the tracks below are unaffected. This also happens when the event on track 1 is an empty event.

The problem I have with it is that I can't see any way to make a smooth fade-in of the event on track 1. It just switches on abruptly when the event starts. So the effect suddenly changes the ovarall picture and then the event fades in.

I would like the effect to be applied as smooth as the fade.

If I go to the Video Track effects window and put the effect to the right of "Composite", then the effect is applied all the time, even to the tracks beneath, which of course is crazy.

See the video and the screen grab.As you can see there, the guy has his light properly adjusted, but when the empty event above him begins he gets lighter because there is a LUT on that track. He The light changes suddely even though the empty event has fades. Efter the empty event ends he goes back to normal color but when the next overlay event begins fadin in he changes back suddely again.

Is there anything to be done to make the track effect to only affect the track it is on? And not the other tracks. Or to make the fade smooth.

Comments

Martin L wrote on 2/28/2018, 5:58 AM

I can add that if a LUT or other effect is applied to the events individually on track #1, only those event are affected and their fades become smooth. The tracks below them are not affected. So it is only when putting the effect on the entire track the the strange thing occurs.

Marco. wrote on 2/28/2018, 6:20 AM

Could you share such a project file (without source media)?

Martin L wrote on 2/28/2018, 6:23 AM

Yes, I could. But first, is this happen to all VP15 users or is it only me? Does it happen to you if you do the same?

Martin L wrote on 2/28/2018, 6:47 AM

Actually, I started a new project to share and tried to get the same phenomenon in it. As I tried different settings I noticed that the strange behaviour only happened to some of my LUTs and only the ones that brings a Log to Legal levels. Those from Log to Full didn't have that. So I went back to the first project and changed the LUT on track 1 and the problem disappeared, as far as I can see.

Thanks for asking me to send a project file!

So perhaps, problemo solved.

Red Prince wrote on 2/28/2018, 12:24 PM

Does it happen to you if you do the same?

Yes, it does, and it is very annoying. The way I figure it, Vegas does the compositing of the track with the track below (and the track below that, etc, recursively) before it applies any track effects.

I am not saying that is wrong, but it would be nice if it gave us the option of treating the track with effects before compositing or after compositing. Better yet, give us the option to apply some effects before compositing and others after compositing. On the same track. At least in the Pro version!

Or maybe there already is such an option and I have just not figured out how to use it. So I’m very glad you asked. Perhaps we will get our answer here if the option is available, or will have the option included in a future revision (hopefully still in VP15).

Marco. wrote on 2/28/2018, 1:11 PM

That's why it might help to share a project file.