LPub3D is an Open Source WYSIWYG editing application for creating LEGO style digital building instructions. LPub3D uses the LDraw parts library, the most comprehensive library of digital Open Source LEGO bricks available and reads the LDraw LDR and MPD model file formats.LPub3D features: Integrated 3D Viewer powered by LeoCAD Integrated image renderers (LDGlite, LDView and POV-Ray) - no more additional installs Renderer config files accessible from the LPub3D user interface Custom LDraw library LDConfig (part material) file can be passed to LDGlite and LDView renderers Set ROTSTEP (step rotation) meta using 3D Viewer Sort PLI/BOM by part size, color and category Fade previous step's parts Unlimited part list (PLI) annotations Split the BOM (divide parts over number of BOM occurrences) "Go To" page navigation and submodel display via drop-down dialog Automatically generate formatted cover pages POV-Ray high-quality rendered instructions LGEO high-quality rendering library support and auto detection Customizable content page header and footer Text and picture (e.g. logo) front and back page attributes Print/Export preview Standard and custom page size options PDF, PNG, JPG and BMP export formats On-demand, software and LDraw archive library updates