Lego Digital Designer related scripts

The Python scripts have been tested to work on Python 2.7.10 on macOS 10.14 Mojave, Renderman 22.3, 22.4, 22.5, 22.6, 23.0, 23.1, 23.2, 23.3, 23.4.

pylddlib

pylddlib.py is an 'improved' version of pyldd2obj.py. It adds support for LDD modifications (i.e. read the db folder instead of db.lif) as well as generating Logo-on-Studs based on the connectivty information LDD provides. There are also a couple of other small fixes.

pyldd2obj

pyldd2obj.py developed by jonnysp (https://github.com/jonnysp) will read in a Lego Digital Designer .lxf scene file and construct a corresponding Alias|Waveform .obj and .mtl scene from it.

LifToObj (deprecated)

deprecated - it is suggested to use pyldd2obj/pylddlib instead LifToObj.py uses LIFExtractor.py from JrMasterModelBuilder (https://github.com/JrMasterModelBuilder/LIF-Extractor) to extract the Lego Digital Designer LIF library first and then converts the LDD .g geometry files to Alias|Waveform .obj files.

LxfToRib (deprecated)

deprecated - it is suggested to use LegoToR instead LxfToRib.py will read in a Lego Digital Designer .lxf scene file and construct a Renderman .rib file of the scene by using BrickReader.py and ObjToRib2.py to convert the bricks of the scenes (from .g to .obj and finally to .rib) and use the relevant scene information to place the bricks accordingly (rotation, translation).

ObjToRib2

ObjToRib2.py will read in a Alias|Waveform .obj file, construct geometry from it and write out a Renderman .rib file of it. It is an improved version of ObjToRib with support for groups.

prman commands

export RMANTREE=/Applications/Pixar/RenderManProServer-23.4/
export PATH="$PATH:$RMANTREE/bin"

prman -d it -t:-2 ribfile.rib

oslc Primvar.osl

USD commands

export PYTHONPATH=$PYTHONPATH:USD_INSTALL_ROOT/lib/python

Checkpointing

prman -checkpoint 2m,20m foo.rib

This tells prman to save a checkpoint file at every two minutes and stop rendering at 20 minutes. If you want to resume a render:

prman -recover 1 foo.rib

More info in the docs:

https://rmanwiki.pixar.com/display/REN22/Checkpointing+and+Recovery

Useful links

• https://rmanwiki.pixar.com/display/REN22/PxrSurface
• http://cg.earlyworm.co.nz/renderman-commandline/
• https://renderman.pixar.com/forum/showthread.php?s=&threadid=35595&s=3f67579b2c1d88a74b98ea5f86a3c546
• https://www.rockraidersunited.com/topic/3764-lego-digital-designer-lif-extractor/?do=findComment&comment=133146
• http://stefanmuller.com/exploring-lego-material-part-1/
• http://stefanmuller.com/exploring-lego-material-part-2/
• http://stefanmuller.com/exploring-lego-material-part-3/
• https://github.com/chipgw/LibLDD
• https://sdm.scad.edu/faculty/mkesson/vsfx502/wip/best/fall11/kevin_george/rib_teapot/index.html
• http://julius-ihle.de/?p=547
• https://sdm.scad.edu/faculty/mkesson/vsfx755/wip/best/spring2011/zichuan_zhao/lemon/lemon.html
• https://nccastaff.bournemouth.ac.uk/jmacey/Renderman/
• https://www.janwalter.org/jekyll/blender/cloud/attic/2016/07/13/attic.html
• http://www.fundza.com/cutter/whatsnew/index.html
• https://rmanwiki.pixar.com/display/REN22/Denoising
• https://graphics.pixar.com/usd/docs/USD-Frequently-Asked-Questions.html#USDFrequentlyAskedQuestions-WhyIsn'tPythonFindingUSDModules?/
• https://dusankovic.com/store/jVDY/lookdev-kit
• https://1drv.ms/u/s!AknoMrVAVGZDaj7VSRVdRSiCkWA?e=J1neeP
• https://github.com/rioforce/LEGO-Textures
• https://github.com/jpgerdeman/minifig-svg-decals

Lego plastic materials

• Virtually all plastic used by LEGO is a proprietary version of Lanxess’ Novodur acrylonitrile butadiene styrene (ABS), Makrolon polycarbonate (PC) is used for transparent elements and Macrolex dyes for coloring. Delrin or nylon variants are used to make cloth and string elements. http://www.craftechind.com/which-plastic-material-is-used-in-lego-sets/
• Tyres and elastic materials are made from a slightly different polymer to ABS, styrene butadiene styrene (SBS). https://www.compoundchem.com/2018/04/09/lego/
• Green leaves, bushes, and trees in their products will be made from polyethene derived from sustainable sugar cane sources. https://www.compoundchem.com/2018/04/09/lego/

LDD Links

• http://www.jespermosegaard.dk/portfolio/lego-digital-designer/
• https://tcrf.net/LEGO_Digital_Designer
• http://trierlab.com/
• https://drive.google.com/file/d/1qzIoAAUBAcaHVe8gVwXxLl1s0P76o0_D/view?usp=drivesdk

Old LDD Versions

• https://web.archive.org/web/20190622155622/https://lc-www-live-s.legocdn.com/downloads/ldd2.0/installer/setupldd-pc-4_2_5.exe
• https://web.archive.org/web/20190622154657/https://lc-www-live-s.legocdn.com/downloads/ldd2.0/installer/setupldd-pc-4_3_5.exe
• https://web.archive.org/web/20190622154454/https://lc-www-live-s.legocdn.com/downloads/ldd2.0/installer/setupldd-pc-4_3_6.exe
• https://web.archive.org/web/20190622154238/https://lc-www-live-s.legocdn.com/downloads/ldd2.0/installer/setupldd-pc-4_3_7.exe
• https://web.archive.org/web/20190622153820/https://lc-www-live-s.legocdn.com/downloads/ldd2.0/installer/setupldd-pc-4_3_8.exe
• https://web.archive.org/web/20190622153721/https://lc-www-live-s.legocdn.com/downloads/ldd2.0/installer/setupldd-pc-4_3_9.exe
• https://web.archive.org/web/20190622153540/https://lc-www-live-s.legocdn.com/downloads/ldd2.0/installer/setupldd-pc-4_3_10.exe
• https://web.archive.org/web/20190622153357/https://lc-www-live-s.legocdn.com/downloads/ldd2.0/installer/setupLDD-PC-4_3_11.exe