Corel Painter X3 Win/Mac, EDU, EN User's Guide download pdf (Page 814)

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Working with animation and digital videos 791

Each frame in a frame stack can have one layer. For example, if you add an item from

the image portfolio onto a frame, Corel Painter places the image on a layer. You can

move the image around the layer. However, when you move between frames or close

the file, Corel Painter drops all layers — the layer is deleted, and the layer’s content is

flattened onto the background canvas. For more information, see “Layers” on page 479

for more information about working with layers.

The Frame Stacks panel displays thumbnails of several frames. The frame numbers

appear under the thumbnails. The current frame is shown with a red triangle over it.

The number of thumbnails is determined by the layers of onion skin you’ve chosen. By

default, QuickTime and AVI files are opened with two layers of onion skin. For more

information on onion skinning, see “Using onion skinning” on page 797.

Setting movie file sizes

Keep in mind that video and animation can produce huge files. When planning a

project, be careful not to overestimate your available disk space. For an idea of disk

requirements, consider this example: Each 640 by 480-pixel, 24-bit color frame is 1.2

MB. At this size, a 12-fps, 30-second animation would consume more than 400 MB of

disk space.

To calculate the disk space required for a frame stack

1 Using pixels as the unit of measurement for width and height, calculate the

number of bytes required to save the frame stack with the following formula:

(Frame Width) × (Frame Height) × (Bytes per Pixel) × (Number of Frames)

2 Divide the product of the formula in step 1 by 1,024 to convert to kilobytes.

Bytes per pixel is determined by the storage type. For example, 24-bit color

with an 8-bit alpha channel uses 4 bytes per pixel. For more information

about storage types, see “Creating frame-by-frame animation” on page 792.

When you save a movie as QuickTime or AVI, the file size can be reduced by

compression. For more information on compression, see “Exporting movies as

QuickTime” on page 805 and “Exporting a movie as an AVI movie” on

page 806.

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Corel Painter X3 Win/Mac, EDU, EN User's Guide Page 814

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