Piano

[claudiostacciarini]

I took the piano model from here:
http://forum.corona-renderer.com/index.php?topic=1268.0
and made another scene with dof and a little glow in nuke.

[maru]

Everything looks like made of plastic and that glow looks like from some old video game. No offence but I think you should work on your materials and lighting first and then think about post effects like glow or dof.

[Polymax]

but glow is not little )

[claudiostacciarini]

I used PT + HDCache (2000x1500), PT samples 40 and msi 400. Here with 10, 25, 50 and 861 passes (final image without pos). Arm's cello show de noise of dof. I'll work the materials as soon as I have time, thanks! :)

[maru]

When you are rendering with DOF, use PT samples 4-8.

[claudiostacciarini]

Hi maru.
Low values ​​of pt samples will not lower the quality? Thanks for the tip!

[maru]

Generally you can consider it like this:
-less PTS = more passes in given time
-with each new pass each pixel of your image is sampled one time
-more passes = better anti-aliasing on edges, DOF, glossiness, smooth textures

-more PTS = better GI = less passes in given time

It doesn't matter that much if you have lots of time for rendering (for example if you leave it for the whole night) but these values should be tuned carefully if you want good results in shortest possible time.