Settings Settings about the color and the image that will make up the file's background.
Artwork quality Sets the level of quality for the image in the PDF file: Low (1K), Medium (2K) or High (4K).
Allow GLSL Select this check box to include shader-dependent effects in the exported file. These effects include smooth edges along crease lines, imprint effects (embossing and debossing) and varnished surfaces.
IMPORTANT: Leaving the check box empty will not make crease lines visible in the exported file.