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    Intermediate  
 
  Understanding Transparency Masks In Canvas™ 6 - Part Three

Channels And Masks

In Canvas 6 you can use the Channels palette to create an alpha channel from a channel mask and vise-versa. This can come in handy if you want to remove the channel effect but save the mask as an alpha channel or for porting selections from one paint object to another (more here).

10. To save a channel mask as an alpha channel bring up the Channels palette and drag it from the Channel Mask slot (below left) upwards and drop it as an alpha channel (below right).

cnvmask18.gif cnvmask19.gif

11. To create a channel mask from an alpha channel bring up the Channels palette and drag it downwards from the alpha channels (below left) and drop it into the Channel Mask slot (below right).

cnvmask20m.gif cnvmask21m.gif


Creating A Vector Transparency Mask From A Vector Object

You can also create a vector object and convert it into a transparency mask. Bring up the Inks palette and use the Gradient manager to create a new gradient.

cnvmask22.gif   12. Adjust the gradient shape and color spacing then drag and drop the new gradient from the preview box into the grid with the other gradients.

13. Create a new text object, then using the Rectangle tool cnvrecttool.gif create a rectangle and fill it with the new gradient created in the previous step.

cnvmask23.gif

14. Select both objects and click Object > Transparency > Attach Mask.

cnvmask24.gif

15. Next pull up the Transparency palette and click the "Edit" button. Notice that the transparency mask handles appear just as if the mask were created using the Vector Transparency tools.

cnvmask25.gif

16. Next we will create a channel mask for the text object. Clear the vector mask by clicking Object > Transparency > Detach Mask.

cnvmask25a.gif

17. Click Object > Transparency > New Channel Mask. A new paint object appears in edit mode.

cnvmask26.gif

18. Click Image > Select > All.

cnvmask27.gif

19. Next double-click the Blend tool blendtool.gif and in the dialog choose a Foreground To Background linear blend with a 50% skew. Use the default foreground and background colors (black and white respectively). Click "OK" when done.

cnvmask28.gif

20. Drag the tool upwards like the example below, then release the mouse.

cnvmask29.gif

21. The resulting channel mask will apply a transparency effect to the text object.

cnvmask30.gif

22. Just for fun, click Object > Transparency > Detach Mask then drag the bitmap (paint object) off the text object. You can see what the mask itself looks like.

cnvmask31.gif

Click Here To Continue...

 
 

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