Eternal Tech is a 3D rendering engine based on id Tech 2. It will be available for download and modification for free under the GNU General Public License (GPL). The project was started and is primarily developed by Kevin "Buzzard" Jonasson. It is programmed in C/++ for use on all Windows and Unix-based computers. It will hopefully also ported to other platforms such as the Mac and Linux.
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Got bump and spec maps to work somewhat.