Original Post
I have just finished creating a geometry shader to extrude fins along the silhouette of a mesh for fur rendering. Unfortunately I am getting a strange artifact in the fin textures as they rotate. fins_bad.bmp The fins are textured using a base texture (in this case a leopard fur pattern), and an alpha map generated by my program. The fragment shader is responsible for combining the two components for each fragment. As you can see when viewing the fins from different angles the crosshatching is more noticeable, and the alpha values seem to have little affect. The right side of the top most fin is a good example of what the fins should look like. I am certain that only one fin is being extruded for each edge, and that the alpha map itself does not have any errors. Any ideas? Please let me know if you need more info.
