Apophysis grainy

ccb

Forums Newbie

Posts: 2

« on: July 02, 2016, 06:16:57 PM »

I have used other fractal programs and have seen beautiful crisp Apophysis images. Whenever I render one from Apo 7X, it always comes out grainy looking like this - http://cbrundage.net/apo.jpg It must be some very basic thing I am doing wrong. I have W10, gaming level computer, I use the settings I've seen recommended for rendering (10,000 density, 0.4 filter radius, oversample 2). What am I doing wrong? Thanks for any help!!


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TheRedshiftRider

Fractalist Chemist
Global Moderator
Fractal Iambus

Posts: 854

Re: Apophysis grainy

« Reply #1 on: July 02, 2016, 06:27:44 PM »

I think this is the problem you are having:
https://en.wikipedia.org/wiki/Moir%C3%A9_pattern

I don't know how to solve it though. I would have tried to render a large image and then scale it down. but I see you've already tried that. The wiki page might contain useful information which could help you.


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ccb

Forums Newbie

Posts: 2

Re: Apophysis grainy

« Reply #2 on: July 04, 2016, 02:30:51 AM »

Thanks for replying. A friend who is very fractal knowledgeable is going to give me step by step instructions in how to remedy it, so I guess it isn't a simple solution.


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lycium

Fractal Supremo

Posts: 1158

Re: Apophysis grainy

« Reply #3 on: July 04, 2016, 01:39:59 PM »

To reduce the grain in Apo images, you have to increase the "quality" parameter; a value of several thousand can often be needed.

Besides this, Apo uses some quite old rendering algorithms, and doesn't have particularly good anti-aliasing / final image quality; if you're interested, I develop an alternative (commercial) program aimed at making high quality IFS / flame fractal renders: http://www.chaoticafractals.com


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