You design a lamp panel at 12 cm. Someone asks for 18. You scale the outline, and now the cut pattern is the wrong size for the panel — so you go back and redraw it. Anyone who has sold laser files knows that loop.
Effects can now be driven by a slider, which means the panel and the pattern cut into it resize together. Here is the whole thing in about ten minutes, in the browser, with nothing to install.
Build it
Make the panel. Tools, then Create Shapes, then Solid Shape. A flat square lands in the 3D view.
Add the pattern. With the shape selected, open Effects and pick Image Cutout, then upload the artwork you want cut out. Size it the way it should look at the panel's normal size — that resting look is what the slider will drive away from, so get it right first.
Add a slider and give it a range you would actually sell, say 2 to 11. Leave it sitting at its default.
Move the slider to the top of its range.
Grow the cutout. Drag a corner of the purple box, or type a bigger Size.
Press Set State. The confirmation tells you how many effect parameters it captured — if it captured none, the cutout was still at its resting size.
Drag the slider.
Same panel, same file. The slider is doing all of it.
Two things that make it nicer
While you drag one of the effect's handles, the panel's corner points show up as white dots and its centre as a blue ring. Bring the handle near one and it snaps straight onto it, so centring a pattern is a single motion instead of a fight with the number fields. Hold Ctrl while you drag if you want to ignore them.
And once a field is driven by a slider, a small icon appears on it. Click the icon to see which slider owns that number, disconnect it from one slider, or drop every connection at once — the value returns to what it was at rest.
Size X and Y carry the icon because a slider is driving them. Position and Rotation do not.
If you sell laser files
This is the part that saves real hours. One parametric model covers every size a buyer asks for, and you export the SVG at whichever one they picked. No folder of near-identical files, no redrawing a pattern because the panel grew 6 cm.
The full reference is in the guide, under "Drive an effect with a slider": https://flexcut3d.com/guide/how-to-use
Try it yourself at https://app.flexcut3d.com — free, runs in the browser, nothing to install.