User Guide

70 Corel Painter User Guide
To set reference layer options
1 Select a reference layer.
2 Choose Effects menu > Orientation > Set Transform.
3 In the Set Transform dialog box, adjust any of the following settings:
• Retain Alpha works with placed images to retain the file’s alpha channel. When
the image is placed, the channel becomes the layer mask. Disable this option to
discard the channel.
• Horizontal and Vertical define the scaling relationship between the reference
layer and the source layer. If the scaling is low, 33% for example, and you
increase it, Corel Painter refers to the source layer to obtain more pixel data.
• Constrain Aspect Ratio maintains the proportions of the image. Disable this
option to distort the image proportions.
• Rotation and Slant rotates or slants the layer based on an original position of 0°.
Enter positive values to rotate or slant the layer counterclockwise; enter
negative values to rotate or slant the layer clockwise.
• Fast sets a high sampling ratio to produce a low-resolution reference layer. A
low-resolution reference layer contains less information, so it can be
transformed quickly.
• Clean sets the sampling ratio at 1 to 1 to produce a reference layer of the
highest possible resolution — up to that of the source. This shows a better
image as you work, but takes much longer to calculate transformations.
The Quality setting (Fast or Clean) applies only to the quality of the reference
layer. When you convert a reference layer to a pixel-based layer, Corel Painter
resamples the original image to produce the best possible resolution.
Rotate a reference layer Hold down Command (Mac OS) or Ctrl
(Windows), and drag a corner handle. The
pointer changes when you position it over a
corner handle .
Skew a reference layer Hold down Command (Mac OS) or Ctrl
(Windows), and drag a side handle. The
pointer changes when you position it over a
side handle .
To Do the following