Hi i want to create a blury background.
My problem is i can’t find the way to make my layer sharp (the one i want to be focus on).
My layer is in 3d and i changed the rotation a bit (-12 xyz).
So how have my grid Sharp and the stuff behind realy blury without being far away from camera.
Thank you.
hi Nicolas,
there are a couple of work arounds to this one…
a) you could have your background pushed really far behind and then scale it up…either which ways you’d want it blurry, so any minor artifacts would get covered up
b) fake it by applying some sort of blur (fast blur in case you’d want to render it faster)
c) the actual way of going ahead with it is to play with the distance between the background and your foreground, set these two up first, then goto your camera settings and adjust your aperture, blurriness and especially your focus distance < that was actually a no brainer but, it all depends on how far you need your background to be…
if you are into photography, this would really be a cakewalk, however to make things simple and with the screenshot youve provided:
your blur level is too high - try something around 400
apeture anywhere between 50-60
focus distance between 2500-300
and see how things work by pushing your background and foreground towards and away from the camera
All the best!
Thanks you for this complet answer 
Actualy i just put those value to show the problem easily.
What i would like is too make the focus area bigger in depth, so i can have a range where the layer will be sharp inside of the area of focus.
My layer will rotate and i would like to be sharp when he’s a bit too far and near of the focus.
I feel stuck between big blur and sharp, the balance between both are not what i would like to be.
(i wish i could do the option A or B, but with my animation i can’t)
A trick I like to do, is precompose one layer into a new composition with a duplicate camera. You end up with two compositions, each with their own camera with the same properties and animation. From there, you can control depth of field independantly and just layer them together. (Or have DoF completely turned off for some things for that matter. If you need to adjust the camera, simply link the properties of your precomp camera to the main camera with expressions. (Pickwhip is awesome!)
Check your camera settings. DOF is defined by focal length and aperture width. You are just using a very short focal length or too large an aperture. Also consider reducing the blur amount.
Mylenium
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