Lesson 13: Use the Sphere to Carve out the Roof

Next you will carve out the under side of the roof with the sphere using a Boolean operation.

To carve out the roof:

Change back to Director's View, by choosing Director's View from the View Options menu on the Control Palette.

Now, you will assign Boolean properties to your objects. The sphere is selected, so we'll start with that.
Click the Object Attributes button next to the sphere's bounding box.

The Object Attributes dialog box appears.

Under the title, Sphere 1, the button for Neutral is selected. That is the default for all Bryce objects.
Enable the Negative option.
Click the OK icon to exit the Object Attributes dialog box.

The sphere's wireframe changes to dotted lines.

Next, make the pyramid positive.
Select the Pyramid by clicking it. Its wireframe turns red.

You could use the Object Attributes dialog box to make the pyramid positive. However, Bryce has an easier way.
Type P (for positive).

The wireframe doesn't change; its line is still solid.

TIP: To make an object negative, type N. To make it intersect, type I. To make it neutral, type the letter O.