diff --git a/transforms.scad b/transforms.scad
index 98dd549..8af3b38 100644
--- a/transforms.scad
+++ b/transforms.scad
@@ -2170,16 +2170,11 @@ module round2d(r, or, ir)
 //   can let you round to different radii for concave and convex corners.  The 3D object must not have
 //   any parts narrower than twice the `or` radius.  Such parts will disappear.  This is an *extremely*
 //   slow operation.  I cannot emphasize enough just how slow it is.  It uses `minkowski()` multiple times.
-//   Use this as a last resort.
+//   Use this as a last resort.  This is so slow that no example images will be rendered.
 // Arguments:
 //   r = Radius to round all concave and convex corners to.
 //   or = Radius to round only outside (convex) corners to.  Use instead of `r`.
 //   ir = Radius to round only inside (concave) corners to.  Use instead of `r`.
-// Examples(2D):
-//   round3d(r=10)  {cube([40,100,40], center=true); cube([100,40,40], center=true);}
-//   round3d(or=10) {cube([40,100,40], center=true); cube([100,40,40], center=true);}
-//   round3d(ir=10) {cube([40,100,40], center=true); cube([100,40,40], center=true);}
-//   round3d(or=16,ir=8) {cube([40,100,40], center=true); cube([100,40,40], center=true);}
 module round3d(r, or, ir, size=100)
 {
 	or = get_radius(r1=or, r=r, dflt=0);
@@ -2197,6 +2192,7 @@ module round3d(r, or, ir, size=100)
 // Description:
 //   Expands or contracts the surface of a 3D object by a given amount.  This is very, very slow.
 //   No really, this is unbearably slow.  It uses `minkowski()`.  Use this as a last resort.
+//   This is so slow that no example images will be rendered.
 // Arguments:
 //   r = Radius to expand object by.  Negative numbers contract the object.
 //   size = Maximum size of object to be contracted, given as a scalar.  Default: 100