Every MOC on Webrick has a full parts list and building instructions. There are many different types of instructions and some instructions require special software to open. If you can't open your downloaded MOC files, check the list of required software below.

BI Type	File Extension	Software Required	Description	Link to Download Software
PDF - Computer Images	PDF	Adobe Reader or other PDF Reader	A PDF file containing a sequence of computer-generated images. These are usually the easiest type of instructions to follow.
PDF - Generated from LDD	PDF		A PDF file containing the output of a LEGO Digital Designer model's automated building instructions. The quality will vary based on how the model was designed.
PDF - Generated from Studio	PDF		A PDF file containing the output of a Studio model's automated building instructions. The quality will vary based on how the model was designed.
PDF - Photo Sequence	PDF		A PDF file containing a sequence of photos of the build process.
3D File - LDraw MPD	MPD	LDraw™	Requires software that supports the LDraw system to open.	LDraw system
3D File - LDraw LDR	LDP	LDraw™	Requires software that supports the LDraw system to open.	LDraw system
3D File - LEGO Digital Designer LXF	LXF	LEGO Digital Designer (LDD)	Requires LEGO Digital Designer to open. The quality of building instructions will vary based on how the model was designed. NOTE that this software is no longer supported by LEGO but it still works despite the warnings it shows. LEGO Group announces that BrickLink Studio will replace LEGO Digital Designer (LDD) as the official virtual LEGO building software going forward. Alternatively, you can use BrickLink Studio to import the LXF files and convert them to it's own format.	LEGO Digital Designer (LDD)
3D File - BrickLink Studio	IO	BrickLink Studio	Requires BrickLink Studio to open.	BrickLink Studio
Computer Images	Jepg/Jpg/Png /Bmp/Gif…		A listing of individual computer generated images showing the step-by-step process to build the MOC- but not in PDF format.
Photo Sequence	Jepg/Jpg/Png /Bmp…		A bunch of individual photos showing the step-by-step process to build the MOC
Video File	mp4/wma/…		A video showing the instructions, most often on Youtube.
Compressed file package	zip/rar/tar/taz/…		Sometimes the instructions will be packaged into compressed archives such as ZIP or RAR. These can be extracted either using built-in tools within your OS or installing a third-party tool such as WinZip or 7-Zip.	Extracting Files

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