{{Infobox software | name = Freestyle | logo = | screenshot = | caption = | collapsible = | author = | developer = Emmanuel Turquin, Stéphane Grabli | released = | latest release version = 2.2.0 | latest release date = {{Start date and age|2008|03|05}} | latest preview version = | latest preview date = | programming language = C++ | operating system = Linux, Mac OS X, Microsoft Windows | platform = | size = | language = | status = | genre = Renderer | license = GNU General Public License | website = https://freestyle.sourceforge.net/ }}
'''Freestyle''' is a free, open source renderer for non-photorealistic line drawing from 3D scenes.
== Model == The program uses a shader script model inspired by the RenderMan Shading Language, allowing different shading styles to be written as a script that's interpreted at the render time. The different rendering styles are based on "style modules" that are written in Python programming language.<ref>{{cite web|title=Programmable Style for NPR Line Drawing|url=http://maverick.inria.fr/Publications/2004/GTDS04/|publisher=ACM Press|accessdate=23 June 2013|author1=Stéphane Grabli |author2=Emmanuel Turquin |author3=Frédo Durand |author4=François Sillion |date=June 2004}}</ref>
The stand-alone program, which uses OpenGL and the Qt widget toolkit, can render images based on .3ds files. The stand-alone version of Freestyle is not under active development anymore, since 2008.
Freestyle is integrated with Blender as of version 2.67.<ref>{{cite web|title=Blender 2.67: Freestyle Line Rendering Engine|url=http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.67/FreeStyle|accessdate=23 June 2013|date=May 2013|archive-url=https://web.archive.org/web/20130606091728/http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.67/FreeStyle|archive-date=6 June 2013|url-status=dead}}</ref> The Freestyle version integrated with Blender is under active development.<ref>{{cite web|title=Freestyle integration into Blender|url=http://freestyleintegration.wordpress.com/|accessdate=23 June 2013}}</ref>
== See also == {{Portal|Free and open-source software}} *Aqsis *Pixie (renderer)
== References == {{Reflist|2}}
==External links== *[https://freestyle.sourceforge.net/ Official website] *[https://sourceforge.net/projects/Freestyle Freestyle] on SourceForge.net *[http://blendernpr.org/bnpr-exclusive-freestyle-peregrination-into-blender/ Blender NPR about Freestyle]
{{DEFAULTSORT:Freestyle (Software)}} Category:Free 3D graphics software Category:Free software programmed in C++
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