Thanks andybot, I will try it tomorrow.
My comment was about aperture option (not f-number) :

I don't understand why the aperture doesn't work like this capture vray.com (is disabled for you and me) :

Size of Aperture
There is Aperture located at the top of the control panel for Depth of Field under Camera. V-Ray doesn't use the same number unit of F1.4 F2.0 F11 as the normal camera does to control the amount of light that comes into the camera. Instead, it uses the system unit for its size. Smaller numbers have less effect on Depth of Field. Larger numbers will make the object very blurry and takes a longer time to render, especially when calculating the edge of object for Depth of Field effect. So we recommend you start with a smaller number and move your way up if you need a stronger effect. This scene’s aperture was set to 24. I recommend you try different values and see what results you get.

Source : http://www.vray.com/vray_for_sketchup/manual/depth_of_field_in_vray_for_sketchup.shtml

Up

Hi andybot, thanks for your reply !

I tried DOF directly with VRay, but I've no result in my scene I created another file to experiment the options : http://img15.hostingpics.net/pics/209127Capture.png

• Distance to yellow cube is 142''
• If I force Aperture option to 100 (larger sizes produce more blur) by disabling enabling Physical Camera, the result is the same
• If I choose 20'000 for shutter speed, and 1 for F-number, it's a little (very little) blurry

What's wrong ?

Hi andybot !

Thank you for you answer, without refraction the glass seems to be a little more transparent on ZDepth channel but I just realise that this technic isn't the best for my case, because now, the reflects on the glass are blurry too ahah !

Here is my render : http://img15.hostingpics.net/pics/596204testOK.png
What do you think (as a pro) ?

Next step, I'll try to render the depth field directly with VRay !
Best regards,

swissboy

Hi everyone,

I use ZDepth for post lensblur in PS, but I've a problem in my scene : a transparent glass is in middle distance. This glass appears close in zdepth channel so all things in background (of the this glass) aren't blurry. Lot of forum are talking about mental ray options for zdepth opacity, but i can't find a solution for vray (or to render by hiding it...).

Can anyone help me ?
Thank you

swissboy (I'm a newbie)