DOF and Final Renders. Tip of the Day:
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When you have your DOF set up and it is time for the final render pay close attention the Pixel Samples X and Y settings in the Advanced Render Setting pane (refer to the images below). The default is 4 and with the changes made in Daz Studio 4.5 these should be good for most purposes. Pixel Samples X and Y are mainly there for anti-aliasing but comes in to play more with DOF. When it comes to DOF these need to be increased. Refer to the low quality render below and look at where the pixilation occurs, the arrows will guide you.
. The Maximum in DS4.5 is 16 samples. The maximum used to be 64 in Daz Studio 3.
In conjunction with increasing the Pixel Samples X and Y, also increase the Shading Rate quality, lower being better quality. 0.2 should be good enough for most images but you may have to lower it more in some cases. All this super sampling will take care of the pixilation that can occur with DOF.
This is when we tell the render engine to sample a pixel a number of times which results in a cleaner render. The higher the quality we set the more samples are taken the better the image may be. Yes I said “May Be” better as it most cases increasing the quality higher will just take more time to render with very little increase in quality. The real super sampling is needed when we use advanced lighting and surfaces shaders etc.
So in the Final render below with the Pixel Samples at 16 means the render engine is taking samples of one pixel 16 times on the X and Y axis of the anti-aliased edges.
This relationship between DOF and Pixel Samples depends on the Value of the F-Stop. The higher the F-Stop Value the less blur which requires less Pixel Samples. The lower the F-Stop value the more blur which requires higher Pixel Samples. Since I had a low F-Stop value of 10 meaning more blur (see image below) I used the Maximum Pixel Samples X and Y setting of 16.
Notice I also increased Shadow Samples to 24. This is because I was using soft shadows. The softer edge to the shadows needs more Shadow Sampling. 16 to 18 in generally good but since this image only took 15 minutes to render I set it to 24 to be safe.
I found this helpful in regards to Render Settings: http://rubicondigital.host22.com/index.php/articles/poserdazstudio/4-optimising-render-settings-in-daz-studio