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Help => Graphics => Topic started by: lolz123 on August 17, 2011, 12:05:12 am

Title: Render Image Anti-aliasing
Post by: lolz123 on August 17, 2011, 12:05:12 am

Hello everybody,

Does anybody know how to perform anti-aliasing on a render image?
I have found some older posts here about this issue, but they did not actually present a solution to this problem. I also found some threads about a newer OpenGL extension which permits FBO anti-aliasing, but I am not sure how to implement it. Also, I read that it is not possible at all when using a p-buffer.

I would appreciate any help you can offer!

Title: Render Image Anti-aliasing
Post by: Laurent on August 17, 2011, 07:58:30 am

The easiest solution is to leave anti-aliasing disabled and simply enable smoothing on the resulting texture.

Not exactly the same result, but can be close enough in most cases.

Title: Render Image Anti-aliasing
Post by: lolz123 on August 17, 2011, 04:34:43 pm

Thanks for the reply.

Unfortunately, enabling smoothing on the render image did not have much of an effect. I do not quite understand why one cannot anti-aliasing any render target besides the main window. Perhaps I can just render to the screen and then take a screenshot and use that. This seems like a pretty ugly workaround though.

Title: Render Image Anti-aliasing
Post by: Laurent on August 17, 2011, 09:11:24 pm

Antialiasing a render texture is not impossible, it's just not implemented. Like you said, enabling it on a FBO is not well supported on older hardware, so I have no magic solution.