Using motion with transparencies><
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James Sharp
- Joined: Sun Dec 12, 2004 10:09 pm
- Location: Northern Cali
Using motion with transparencies><
is there anyway to use transparencies with motion?? im not talking about having a non moving foreground and a moving background. but im talking about having a moving foreground and a moving background. within a key transparency in the foreground. lets say for example a like on the Euphoria video where the dude is runing across the screen and the background is moving also :minute 2:07 on the vid.
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rose4emily
- Joined: Fri Jan 23, 2004 1:36 am
- Location: Rochester, NY
- Contact:
Yes, there is, but you should be prepared to have some fun with making the alpha masks.
If you can get away with a chroma key on the forground layer, then having a moving or non-moving background really shouldn't matter.
If you can't get away with a simple chroma key (complex background, for example) you're probably going to have to composite each frame more or less by hand. If this is the case, you should probably keep this kind of editing to a minimum if you hope to ever complete the video.
If the type of motion is simple, rather than comlpex, you might be able to get away with creating a PNG of the foreground (with the transparency already taken care of in the PNG - you can do this in a photo editor such as Photoshop or The GIMP), and then sliding/rotating/warping/scaling that still over the background footage. This won't work with a running character, but is fine for "sliding squares" with pictures in them and such.
Finally, if the motion is repetitive, you might be able to re-use a small set of stills. Traditional animators did this a lot with things such as "walk cycles" in which six or seven frames could be drawn and reused to create several seconds of footage.
If you can get away with a chroma key on the forground layer, then having a moving or non-moving background really shouldn't matter.
If you can't get away with a simple chroma key (complex background, for example) you're probably going to have to composite each frame more or less by hand. If this is the case, you should probably keep this kind of editing to a minimum if you hope to ever complete the video.
If the type of motion is simple, rather than comlpex, you might be able to get away with creating a PNG of the foreground (with the transparency already taken care of in the PNG - you can do this in a photo editor such as Photoshop or The GIMP), and then sliding/rotating/warping/scaling that still over the background footage. This won't work with a running character, but is fine for "sliding squares" with pictures in them and such.
Finally, if the motion is repetitive, you might be able to re-use a small set of stills. Traditional animators did this a lot with things such as "walk cycles" in which six or seven frames could be drawn and reused to create several seconds of footage.
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