/*title_start*/The Clipping Plane/*title_end*/
/*text_start*/The canvas exists as a cubical space that is viewed directly from the front (along the Z axis). It has a maximum depth, which is calculated automatically based upon the canvas width and height. The back of this space is known as the '\C020202clipping plane\C484848' because anything which passes behind it disappears from view.

By default, new 3D objects are drawn at a depth of 0, which is halfway between the front of the scene and the clipping plane. Brush strokes, on the other hand, default to painting directly on the clipping plane if no other pixols are present.

For example, if you draw a horizontal stroke on a blank canvas with \C020202ZADD\C484848 turned on, followed by a vertical stroke with \C020202ZSUB\C484848 active, the vertical stroke will have the effect of erasing pixols created by the first stroke. What is really happening is that the second stroke pushes pixols behind the clipping plane so that they disappear.

Filling the canvas (\C020202Layer>Fill\C484848) always operates at a depth of 0. If you fill the canvas, then repeat the two lines described above, the first appears as before. But the second stroke is also seen in its entirety since none of the pixols being pushed 'away' fall below the clipping plane.
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