When comparing OpenGameArt vs Filter Forge, the Slant community recommends OpenGameArt for most people. In the question“What are the best sources for textures for game development?” OpenGameArt is ranked 1st while Filter Forge is ranked 4th. The most important reason people chose OpenGameArt is:
All assets made available through OpenGameArt must be licensed under one (or more) of the following: CC0, [OGA-BY](http://opengameart.org/content/oga-by-30-faq), CC-BY, CC-BY-SA, GPL or LGPL.
Ranked in these QuestionsQuestion Ranking
Pro Committed to free/open licensing
All assets made available through OpenGameArt must be licensed under one (or more) of the following: CC0, OGA-BY, CC-BY, CC-BY-SA, GPL or LGPL.
Pro 2D and 3D art
OpenGameArt has both 2D and 3D art assets.
Pro Several filters
Filter Forge includes a lot of filters and each of them has several presets. Filters are grouped into different categories (Organic, Patterns, Creative, Distortions, Photo, etc...) so it's easy to locate them.
Pro Large online library of filters
The website has thousands of filters available for download. This is the only thing that makes the basic edition feasible.
Pro Standalone application or PhotoShop plugin
Filter Forge can be used as both a standalone application and as a plugin for PhotoShop.
Pro Not only a Photoshop plugin, has a lot of other hosts
Con Mediocre organization and search functionality
The curator of OpenGameArt acknowledges that the tools for finding the assets you need are sub-par. Correcting this is a near-future priority for improvement, and as of September 2014 is the next milestone goal of the site's Patreon campaign.
Con Assets may have restrictive licenses
OpenGameArt hosts art under any of several licenses, some of which may not be suitable for commercial projects or for release on certain distribution platforms. Careful review of which licenses are compatible with your project is essential. The site's search facility allows filtering by license.
Con Slow development cycle
New versions come fast enough, but for example, the beta version of 7 doesn't have a lot that 4 didn't have.
Con No free tier
Filter Forge is not free. The basic edition (cheapest one) is $149. It does go on sale regularly though for around $30.
Con Hefty price tag
Its $399 for the professional version, whereas a big competitor used by large studios is only $149.