"alphaQuad" <alp### [at] earthlinknet> wrote:
> trace seems to fail on these CSG lenses, so ... input radius and return x of the
> curve.
>
> in other words, if you have the light radius at lens2_impact, you have the
> distance to lens center

more like

#declare concav_glass_ = // f = -3.99984
#declare maglass_ = // f =  8.275885

Add focal lengths
4.35 was close, v. almost 4.3

should put it in focus position, just had to stare at it long enough

Post a reply to this message