Corel Painter 2015 Guia do Utilizador descarregar pdf (Página 580)

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552 | Corel Painter 2015 User Guide

To change a layer’s composite method

1 Select a layer.

2 In the Layers panel, choose a composite method from the Composite Method list box.

You can also choose a composite depth method from the Composite Depth list box. For more

information, see “Blending impasto with other layers” on page 510.

Creating and deleting layer masks

You can create a new, blank layer mask, or you can create a layer mask based on the layer’s transparency.

A layer mask based on transparency is white wherever the layer has content, and black in other areas.

Intermediate levels of gray are partially transparent. For more information, see “Preserving layer

transparency” on page 541.

You can delete layer masks you no longer need. You can also clear a layer mask without deleting it, leaving

you with a blank mask.

Layer masks let you define what areas of a layer are visible in the document window. Masking originated

as a technique for creating color separations, where sheets of masking material were hand-cut to define

the color regions in an image. In the Corel Painter digital workspace, the layer mask is a powerful tool for

controlling image composition and effects.

Layer masks vs. channels

A layer mask is similar to an alpha channel. Both are grayscale images that you can create and edit.

Although the Channels panel provides access to both channels and layer masks, their characteristics and

functions are different:

• A layer mask is attached to a layer, but an alpha channel is independent.

• The canvas can have up to 32 alpha channels; each layer can have only one layer mask.

• Channels don’t influence the visibility of the canvas image; a layer mask defines what areas of a layer’s

image are visible.

• An alpha channel, when loaded, protects designated areas of an image; a layer mask does not provide

protection.

• A channel is enabled by loading it to a selection. A layer mask can be enabled and disabled at any time,

and it can also be loaded to a selection.

For more information, see “Creating and copying channels” on page 564.

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Chriscof 29 Apr 2024 | 02:09:55

Hello, im noob :)

Corel Painter 2015 Guia do Utilizador Página 580

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