1- Open up Silhouette Alta software.
2- Go to A free image to lithophane site. Click on images.
3- Click on choose file and upload your image. Try to get a good contrast image for best results.
4- Your image will load up as a lithophane.
5- Depending on what you want to use your design for you can select different styles to create.
Once you are happy click on Download.
6- Go to File - Open.
7- Your design will appear onto your design area.
8- Resize to fit your plate. Do not adjust the thickness. this will need to stay as per the design. Click on 3D print.
9- Decide on your print quality (i recommend best for a lithophane) and then click on print.