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Corel Down Under User Group,
Melbourne, Australia
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 BLEND (Object Merge Mode) SETTINGS (page 1 of 4)

Figure 10. Blend Settings available from the Object Properties Dialogue.

The enhanced blend controls are really hot (Figure 10). Blend Settings are reached by selecting Object Properties after either right clicking on an object or on its icon in the Objects Docker.

Complete control of the blend between both active and underlying objects can be adjusted over all channels in great depth.

An example of the power of this feature is shown in Figure 11. Here the blend of one object with another is controlled for each RGB channel by specifying the precise level of transparency and merge for the full 256 colour range of each pixel in each channel. It is this feature which greatly improves PP9's ability to deal with imported PhotoShop files.

Figure 11. An example of using PP9's Blend Settings in the Object Properties Dialogue. The image on the left is the original with two objects - the blue rectangle (lower object) and the textured cylinder (upper object). The belend was created using the settings shown in Figure 10.

The two graphs shown in the Object Blend portion of the Object Properties dialogue box depict the blend controls of the Active Object (that currently selected) and the Composite Underlying object's. Blend controls are manipulated by dragging on the nodes on each graph. You can control the blending of the entire RGB spectrum or the Red, Green or Blue channels separately and in combination. The currently selected node appears as a hollow circle, and the cursor changes to a cross-hair when near it or unselected nodes which appear as filled black circles. You can also drag on the graph itself to move the currently selected node.


Blend Settings Nodes.
You can drag any of the following nodes in either the Active or the Underlying graphs:

  • Increasing Maximum (top left node)specifies the upper maximum grayscale value of the pixels in the object

  • Increasing Minimum (bottom left node)specifies the upper minimum grayscale value of the pixels in the object

  • Decreasing Maximum (top right node)specifies the lower maximum grayscale value of the pixels in the object

  • Decreasing Minimum (bottom right node)specifies the lower minimum grayscale value of the pixels in the object

The Blend Settings graphs depict grayscale representations of the chosen channel. For the separate Red Green and Blue channels, the representation is straight forward with the grayscale value directly representing the equivalent colour value from 0 to 255 for the colour intensity. However, with the combined RGB channel the situation is somewhat more complex with some very different colours having identical grayscale values.

Figure 12. Grayscale representations of the colours in the combined RGB channel.


My interpretation of the situation is that the grayscale value represents the overall lightness of the combined RGB colour. This is shown in Figure 12 where the very light yellows and cyans correspond to a high grayscale value and the more intense / darker colours of blue and to an extent red, correspond to the lower grayscale values.





The description of Object Blends here is quite large and has been broken up into several sections. Please go on to the next page to find out more about blends.

Continue to Page 2 of the Object Blends section

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