This is one of over 4720 effects generated by Filter Forge, a Photoshop plugin that allows you to create your own filters.
To open this filter, you must have Filter Forge 1.0 or higher installed on your computer. If you don't have it installed yet, click here to download Filter Forge
Renders n-gonal regular pyramids and tunnel effects. A special technique, developed by me and Sphinx, is used for attaining a linear perspective. We achieved this by doing some thorough algebraic analysis of the offset modules.
pyramid polygon primitive perspective tunnel passage wormhole extrusion scaling rescaling distance field linear 3d depth volume