In the workflow
Why Invert matters
It is commonly needed when the laser makes a dark material lighter. Confirm whether a control changes only the preview or the engraving signal.
Practical check
How to evaluate it
Use a labeled test patch to confirm whether exposure makes the material lighter or darker. Apply inversion once, and distinguish it from mirroring or rotating the image.
Go deeper
How to Prepare a Photo for Slate Laser Engraving
A careful photo-preparation workflow for slate, including polarity, contrast, dithering, sizing, and a controlled material test.
Read the complete guide