Post Processing Effects - Revision history

Silverfish: Removed section about motion blur for weapons as a special system is no longer used for weapon motion blur.

2017-11-09T14:54:53Z

Removed section about motion blur for weapons as a special system is no longer used for weapon motion blur.

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	~~= Motion Blur for Weapons =~~
	Overgrowth's weapons use motion blur based on stippling. Stippling is also used to render soft shadows, and the technique of stippling is explained in [http://blog.wolfire.com/2009/10/transparent-shadows-using-stippling/ this old blog post]. The motion blur for weapons works by drawing the weapon several times along it spath using different stipple patterns for each instance, as mentioned in the [http://blog.wolfire.com/2011/06/Overgrowth-a135-video-changelog A135 video].

Poddus: stub

2015-02-13T20:16:29Z

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	''Post processing effects are image filters that are applied as a final step before each rendered frame is drawn to the screen -- much like Photoshop filters.'' This explanation is lifted word-for-word from David's blog post on the subject. He doesn't go into much detail about it in his blog posts, but here's links to [http://blog.wolfire.com/2009/04/post-processing-part-one/ part one] and [http://blog.wolfire.com/2009/04/post-processing-part-two/ part two] any way.		''Post processing effects are image filters that are applied as a final step before each rendered frame is drawn to the screen -- much like Photoshop filters.'' This explanation is lifted word-for-word from David's blog post on the subject. He doesn't go into much detail about it in his blog posts, but here's links to [http://blog.wolfire.com/2009/04/post-processing-part-one/ part one] and [http://blog.wolfire.com/2009/04/post-processing-part-two/ part two] any way.

Poddus: Created page with "''Post processing effects are image filters that are applied as a final step before each rendered frame is drawn to the screen -- much like Photoshop filters.'' This explanation ..."

2015-02-13T20:15:40Z

Created page with "''Post processing effects are image filters that are applied as a final step before each rendered frame is drawn to the screen -- much like Photoshop filters.'' This explanation ..."

New page

''Post processing effects are image filters that are applied as a final step before each rendered frame is drawn to the screen -- much like Photoshop filters.'' This explanation is lifted word-for-word from David's blog post on the subject. He doesn't go into much detail about it in his blog posts, but here's links to [http://blog.wolfire.com/2009/04/post-processing-part-one/ part one] and [http://blog.wolfire.com/2009/04/post-processing-part-two/ part two] any way.

= Shaders =
Overgrowth uses GLSL shader language, and the users can create custom shaders. Some blog posts explain how some of the shaders work, such as the posts about [http://blog.wolfire.com/2008/12/object-lighting-part-1/ Object Lightning], [http://blog.wolfire.com/2009/09/character-rim-lighting/ Character Rim Lighting] and [http://blog.wolfire.com/2009/09/trees-in-the-breeze/ Trees in the Breeze]. Overgrowth's character animation is also done through a shader, as David mentioned in [http://blog.wolfire.com/2009/10/character-normal-maps/#comment-18448230 a blog comment].

The skeletal animation is done in the vertex shader anyway, so it's actually
faster and smoother-looking to just apply the bone matrices to the object-space
normal map than it is to recalculate transformed normals and tangents for
each vertex.

= Motion Blur for Weapons =
Overgrowth's weapons use motion blur based on stippling. Stippling is also used to render soft shadows, and the technique of stippling is explained in [http://blog.wolfire.com/2009/10/transparent-shadows-using-stippling/ this old blog post]. The motion blur for weapons works by drawing the weapon several times along it spath using different stipple patterns for each instance, as mentioned in the [http://blog.wolfire.com/2011/06/Overgrowth-a135-video-changelog A135 video].