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jaymac42 | 14 years ago | 4 comments | 2,633 views

I have a night-time picture of a mountain landscape. The sky is fairly dark and I added some particle sparkles to supply some twinkling stars. Only problem is that some of those twinkles are on the side of the mountain! (Falling stars?) Is there a way to mask off a portion of the picture so that the stars remain in the heavens?

Thanks, John




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You can move the stars further away from the camera by adjusting its LAUNCH POSITION property.

Or you can move the mountain closer to the camera by adjusting its POSITION property. Make sure the picture layer is set to 3D IN 3D SPACE (2nd dropdown below textbox)

Or you can cheat by setting the picture layer to 3D IN FOREGROUND (2nd dropdown below textbox) This way the mountains are always on top.

michiel, 14 years ago


I couldn't find the property LAUNCH POSITION on the particle layer. Is that the correct name?

I tried solution #2 but I need the full picture in the frame.

Finally, I tried cheating but the picture (a jpeg) occluded the stars -- no lights in the heavens.

If these are my best choices, I can always do what I want in Vegas but BT is SO much easier to work with! I was hoping for an easy out with BT.

jaymac42, 14 years ago

Maybe you have attached the particles to your picture layer. In that case there's no LAUNCH POSITION property because the picture is used as the launchpad.

So you have a single picture that contains the sky and the mountains and you would have the particles to launch only from the sky part?

I advice you to cut your picture in 2 parts: the sky and the mountains and attach the particles to the sky part.

michiel, 14 years ago


That's just what I did and it works great. Thanks for the idea.

jaymac42, 14 years ago

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