Faking GL_POLYGON_SMOOTH in a fragment shader

OpenGL
1

I want something better than MSAA, without slowing to a crawl. Smooth falloffs using smoothstep() and fwidth() would result in inset-looking triangle. It seems the best I can do is ray casting within some rectangle that bounds the triangle (with appropriate padding). However that would result in a lot of overdraw and having to construct all those rectangles. Is there a better way?

2

You can perhaps use FXAA ?

I have found a thread that speak about this at http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=302404

3

Could you describe or post a picture of a case where you need this?

There are some options, but what options apply to you depend on what specifically you’re having trouble with.

4

Thanks. The problem is that the geometric detail is too high which results in popping of geometry as I move the view.

5

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