On 29-3-2016 5:54, Lsq wrote:
> Hi,I have studied this soft for several days and have 2 questions:
>
> 1、which keyword is used to set the focus of perspective model carema?
> look_at?direction? or others?
> 2、Besides，when one focus of the carema is set,how can we ensure
> that the objects of the image is clear under this focus?
>
> I'm confused about this.Could anyone help me? Thanks!
>
>

Welcome to the club!

I suppose you are talking about focal blur and depth of field like in a 
Real Life camera. Basically, the cameras in POV-Ray are pinpoint 
cameras, i.e. they do not have a lens for focussing. As a result the 
scene is always sharp from foreground to background.

However, focal blur (or depth of field) can be simulated in POV-Ray. The 
best you can do presently imo, is to play with the example camera scenes 
that are present in the scenes/camera folder of POV-Ray. You will find 
there the focalblur.pov scene which you can use, besides all the other 
camera types of course.

-- 
Thomas

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