Hi Peter,

I've checked in a new version of rpict.c that I'm hoping fixes this problem.  
Let me know if you get a chance to try it.

Thanks for spotting the problem!

Cheers,
-Greg

> From: Peter Apian-Bennewitz <[email protected]>
> Date: November 24, 2012 1:17:04 AM HST
> 
> Dear Greg,
> 
> there's probably a reason why the focal length is measured from the front 
> clipping plane and not from eye point ?
> Shifting the front clipping (-vo) shifts the focus too (given as -vd vector 
> length), which is not quite what one would expect, or is it just me ?
> Example use: To set the focal point at an object behind a glass pane, the 
> latter is first removed in rvu using -vo , then the front clipping in rpict 
> is set back. -> mis-focused image.
> (head release as of 19.11.2012)
> 
> TIA1e6
> Peter

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