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In Freestyle, strokes are represented with triangle strips, and stroke colors are realized using vertex colors in order to enable variable stroke colors (i.e., each triangle has a different color). Stroke colors in Freestyle are in the RGBA format, while vertex colors in Blender do not have an alpha component. Therefore, we here employ a 2-pass rendering approach as follows. First, the alpha component of an image is rendered by using the red component of vertex colors as the alpha component of stroke colors (1st pass). The render result is saved into a temporary buffer. Then, the vertex colors of stroke meshes are replaced with RGB values, and the RGB components of the image is rendered (2nd pass). Finally, the RGB and alpha components are merged to produce the render result in the RGBA format.
Welcome to the fun world of open source. For instructions on building and installing Blender, please see the file named INSTALL. ---------------------.Blanguages and the .blender directory--------------------- The .blender directory holds various data files for Blender. In the 2.28a release those are the .Blanguages file containing a list of translations, the translations themselves and a default ttf font. Blender checks for the presence of this directory in several locations: - the current directory - your home directory - On OSX, the blender bundle is also checked - On Windows, the installation dir is checked. If you get a 'File ".Blanguages" not found' warning, try to copy the .blender dir to one of these locations (your home directory being recommended). -------------------------------------Links-------------------------------------- Getting Involved: http://www.blender.org/community/get-involved Community: http://www.blender.org/Community Main blender development site: http://www.blender.org The Blender project homepage: http://projects.blender.org/projects/bf-blender Documentation: http://www.blender.org/education-help Bug tracker: http://www.blender.org/development/report-a-bug Feature request tracker: http://wiki.blender.org/index.php/Requests