christosviskadourakis Posted February 3, 2016 Share Posted February 3, 2016 Hello there, I am pretty sure I am doing something wrong like I say in the title. I want to render my VrayEnvironmentFog as an element in order to work on it in post production. Therefore, I use an override black material, I set low values and I hit it. The problem is that this render takes way much more time than the main image. I wanted to ask for advice on the values because they might be too high without reason. So I render in 1920x1080, I set the antialiasing to adaptive and and the image sampler at 1/4 (min/max). Then I set light cache at 500 and irradiance at low. Just to let you know, I render my main image at 1920x1080, image sampler 1/16, light cache 1500 and irradiance at high. Any Advice please? Link to comment Share on other sites More sharing options...
christosviskadourakis Posted February 3, 2016 Author Share Posted February 3, 2016 Anyone, please? Link to comment Share on other sites More sharing options...
Chris MacDonald Posted February 3, 2016 Share Posted February 3, 2016 So how long is it taking, roughly? Link to comment Share on other sites More sharing options...
christosviskadourakis Posted February 4, 2016 Author Share Posted February 4, 2016 hold tight...26 hours (i have an i5 4690 and 16 G ram) Link to comment Share on other sites More sharing options...
Chris MacDonald Posted February 5, 2016 Share Posted February 5, 2016 And your fog settings are...? Link to comment Share on other sites More sharing options...
christosviskadourakis Posted February 5, 2016 Author Share Posted February 5, 2016 fog distance: 50m scatter bounces: 1 height: 100m subdivs: 300 step size: 4m texture samples: 4 Link to comment Share on other sites More sharing options...
Chris MacDonald Posted February 5, 2016 Share Posted February 5, 2016 300 subdivs is what's causing it! I use the default 8. Link to comment Share on other sites More sharing options...
christosviskadourakis Posted February 5, 2016 Author Share Posted February 5, 2016 http://www.the-boundary.com/blog/2015/5/2/carey-house-tutorial-08-atmosphere So they are wrong. Because they elaborate a bit about the 300 subdivs. Nice, the render has been finished now so I will test 8 subdivs on my next project I guess. Thank you very much sir! Link to comment Share on other sites More sharing options...
Chris MacDonald Posted February 5, 2016 Share Posted February 5, 2016 But they are baking it into the scene and don't have the luxury of noise removal in post. You can run a noise removal filter over an atmosphere pass and comp it in post with very few artifacts because your base render is clean. It's worth keeping in mind that volumetric fog is slow to render. Always. It's an effect that is computationally very expensive, so don't expect to ever be able to get it down to 5 minutes or anything. Link to comment Share on other sites More sharing options...
christosviskadourakis Posted February 5, 2016 Author Share Posted February 5, 2016 You got a point. And I like it. Thank you very much! Link to comment Share on other sites More sharing options...
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