Apple Shake 4 Tutorials Manuel d'utilisateur télécharger pdf (Page 101)

Chapter 3 Depth Compositing 101

3 In the city_/jointfilesconvert/1578512/bg parameters, click the button to enable autoAlpha.

A solid white alpha channel is created for the image.

Note: As an alternative, you can also attach a Color–SetAlpha node after the city_/jointfilesconvert/1578512/bg

node.

4 Click the left side of the ZCompose node to load the corrected composite into the

Viewer.

Adjusting Z Depth

When you combine the effect of two or more Z channels, as in this example, the

distance values do not always correspond to the result you want in the composite.

The Color–Mult node (not lMult) includes a depth parameter that lets you “push” or

“pull” the depth values. You don’t need to do this for the current example, but it’s

worth noting for future reference.

To adjust the Z depth, add a Color–Mult node to an image, then adjust the depth

slider. Give it a try and you’ll see the image forward or backward according to depth.

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Apple Shake 4 Tutorials Manuel d'utilisateur Page 101