Filter Forge is a high-end plugin for Adobe Photoshop allowing computer artists to build their own filters. The key features of Filter Forge include the filter editor and a free online library of user-created filters, currently containing more than 11,000 filters.
All filters are adjustable, resolution-independent, support real-world HDRI lighting, and most of them can be seamlessly tiled. Also, filters can automatically generate diffuse, specular, bump, and normal maps, which are essential for 3D-model building. All filters are built in a visual node-based environment allowing users to connect familiar operations, such as blurs, gradients, color adjustments, distortions, or blending, into a network to combine their effects.
Understand Filter Forge and how does it work by watching this video.
You can try Filter Forge for 30 days without any limits. Everything you create is yours, even for commercial projects.