Gareth Randall
Forum Replies Created
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I’m intrigued to know why you’re trying to link a mask to a camera move rather than simply using a motion tracking behaviour to matchmove the mask on.
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[Colin Heichman] “Keyframe the opacity to zero on the frame before that point and 100% on the exact frame where the logo is covered. As the light streak “writes off”, it’ll reveal the logo which was there all the time but transparent.”
That’s certainly one way of doing it, but you can also make the logo appear to write on rather than fade on, which is what I did in my example.
Quick’n’dirty way of doing it:
Step 1 – position and size your logo appropriately. I just used a letter “C” in a flowery font.
Step 2 – use the Bezier tool to draw a path from one side of the screen to the other, tracing the outline of the logo. Double-click on the final point so that it remains a line and not a filled shape. (I’ve made the background green on this grab so that you can see the Bezier shape path more easily).
Step 3 – select your Bezier line in the Layers list, go to the Shape tab of the Inspector, turn on Outline, set the brush type to Airbrush, and then crank up the brush width until the logo is completely covered. Add a Write On behaviour to the Bezier line.
Step 4 – add an image mask to the logo, then drag the Bezier line into the mask source well, ensuring that the mask source channel is set to Alpha and the mask blend mode to Add (it should default to these settings). Play the sequence and you should see the logo draw itself into existence. The Write On behaviour is animating the Bezier line to create an animated mask that reveals the logo.
Step 5 – duplicate the Bezier line, drag it above the logo layer, turn on its visibility checkbox and delete the Write On behaviour. Go to the Shape tab of the Inspector and in Shape Styles, select one of the light streaks. Adjust the brush width to taste. The light streak will animate across the full width of the screen, and appear to write the logo on as it passes.
Your Layers stack should look something like this:
Hope this helps!
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Hi Phoenix,
Is this the sort of thing you mean? (You’ll have to click on the link, I can’t seem to make the actual video clip embed into the post).
https://reels.creativecow.net/film/cstreak-test
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You can also check out Patrick Sheffield’s amazing book “How To Cheat In Motion”, which includes tutorials for shattering images in various ways using just the tools that come with Motion.
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Hi Mike,
It would be great if you could upload the footage of the sculpture so that we know exactly what you’re dealing with, but off the top of my head, a 4-point corner-pinning track using the corners of the rectangle on the sculpture would be a good place to start.
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Just as a couple of extra ideas, I find that using a shape to create a “hot spot” in the middle of the projector screen helps to sell the effect, as does using a wriggle behaviour on the opacity (just a small amount).
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Another approach would be to create a Bezier shape over the eye to give the impression of it being closed, and then animate it over a few frames to give the impression of it opening and closing.
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What I’d do is look up the relevant Google Maps page on the computer with the highest-res display I could find, and take a screen grab of that. On my MacBook Pro that would be 1680×1050, which at 72dpi should give you plenty of room to pan and zoom in a 720×480 project. Or am I missing something?
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[Landon Satterfield] “Has anyone ever made a physical string, that moved like one, in Motion?”
It’s fairly straightforward to make a swinging pendulum out of a solid line, but do you want a string that will go slack or taut in a realistic way? If so, not sure how you’d do that in Motion without tediously having to hand-animate points on a Bezier shape.
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Hi Martin,
You might want to check out this tutorial: Adjustable Master Templates
It shows how to use the Link behaviour in Motion 4 to do exactly (I think!) what you want.