OpenSCAD User Manual/Modifier Characters

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Background Modifier

Ignore this subtree for the normal rendering process and draw it in transparent gray (all transformations are still applied to the nodes in this tree).

 Usage example:
 % { ... }

Example code:

difference() {
        // start objects
        cylinder (h = 4, r=1, center = true, $fn=100);
        // first object that will subtracted
        % rotate ([90,0,0]) cylinder (h = 4, r=0.3, center = true, $fn=100);
        // second object that will be subtracted
        % rotate ([0,90,0]) cylinder (h = 4, r=0.9, center = true, $fn=100);
}

Background modifier example

Debug Modifier

Use this subtree as usual in the rendering process but also draw it unmodified in transparent pink.

 Usage example:
 # { ... }

Example:

difference() {
        // start objects
        cylinder (h = 4, r=1, center = true, $fn=100);
        // first object that will subtracted
        # rotate ([90,0,0]) cylinder (h = 4, r=0.3, center = true, $fn=100);
        // second object that will be subtracted
        # rotate ([0,90,0]) cylinder (h = 4, r=0.9, center = true, $fn=100);
}

OpenScad Debug Modifier example

Root Modifier

Ignore the rest of the design and use this subtree as design root.

 Usage example:
 ! { ... }

Disable Modifier

Simply ignore this entire subtree.

 Usage example:
 * { ... }