I thought this would be a more elegant (or at least discernible) way to do it, Jean Marie (@jmcc). But it's not adding the calculated value to the end of the new list, it's adding the last number to the start of the new list. Very confusing to me how it's getting the Build List order messed up. If you hover on the ports (see green and pink rectangles) you can see it has worked out that 8 is the next number in the sequence but it didn't get written to the list (blue rectangle). Maybe you can sort it out and get it going for me?! And even better, explain what I've done wrong here!

Well, I obtained the type of mask I was looking for by passing the source image into `Adjust Image Colors`, setting Saturation at -1 and playing around with the Gamma.

Thanks for the solution, Jean Marie (@jmcc). Yes seeding a loop is tricking in Vuo! And I wasn't aware of the Spin Off Event nodes, which certainly put solving this within reach, so thanks for those. I wonder if there's a next level Vuo that can make solving the event logic of these kinds of things easier. Will give it some thought, to this new user a solution this complicated is a bit opaque to the casual glance of a novice user and would be hard to just cobble together following one’s nose.

Computing patterns are best met in Vuo with dedicated nodes I'm feeling, where they just work taking the misuse/misunderstanding of event flow etc out of the equation.

# Mask Image by Brightness node and "Vuo black"

In an image, I'm trying to select the "Vuo black" (like the black that results from empty space with `Render Layers to Image`) by using `Mask Image by Brightness`.

The settings give me pause. How to set the Preserved Brightness? 0.01 to 1? 0.001 to 1? 0.0001 to 1? What is the good setting to catch only the "Vuo black"?

And then, the Brightness Type, again, in conjunction with the Preserved Brightness, what is the good setting to catch only the "Vuo black"?

There may be a more elegant way to do this, but here is one approach. My challenge was seeding the list with the first two terms.

@kyrrelys posted a new Question, “Variable bitrate @ save to movie

I´m playing around with the save to movie node, trying to change the video quality in the format parameter on the fly. Can´t really seem to get it to work.

Am I doing something funny here? Or is this a feature, ie is the format parameter only read at the start of the recording?

Any feedback appreciated!

Patch attached.

Just following on from the Manual examples in sections 4.3.4 Multiple triggers and 4.3.5 Feedback loops I thought how can I hold not just the last added value, but the one before it also and then add the two for the new number to append to list.

Tried a whole bunch of approaches using all kinds of nodes like Schedule to start making a list with 0 and 1 and then the latest addition. Tried using enqueue (I'd use a Queue in QC I think).

I just can't work out even an overly complicated way to do this in Vuo let alone an elegant way.

It's probably harder to learn Vuo coming from Quartz Composer: the person expect something to work in a certain way, and it doesn't. I tried QC maybe six or seven years ago and wasn't able to wrap my head around it. I began using Vuo a year ago and within a few hours, I had something minimal to show for. I try to promote Vuo any chance I get, but around me, it's either QC or TouchDesigner...

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