[simmsimaging]

Bit tightly wound aren't we?

[jfrancis]

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[simmsimaging]

I'll refer you to your own comment:

too many junk posts.

If I wanted to be at eatpoo.com I'd be there.

[jfrancis]

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[jfrancis]

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[Maximus3D]

I'm sorry to hear you spent time in the hospital, that can't have been fun.

Anyhow, back on topic again if possible.. about this fresnel lens. In your examplephotos i can't see any big difference from spots or snoot type lights.
What makes the use of fresnel lenses so different from these other types of lights ? what makes them better ? could you elaborate a bit more on this as i would be interested in knowing more about this. It's related to one of my current projects.

/ Max

[Bubbaloo]

At this point, I can't imagine rendering a scene with pure caustics. I'd rather simulate the effect with other types of geometry (light housings). But it's still a cool test you're doing with the lens. The result looks great.

[jfrancis]

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[jfrancis]

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[Maximus3D]

Bills are never a joy no matter where they come from, ugh..

Now tell me more about what i asked you. The real benefits of using such a lense instead of other types of lighting. What it adds to a shot and more.. i'd like to know.

/ Max

[jfrancis]

Now tell me more about what i asked you. The real benefits of using such a lense instead of other types of lighting. What it adds to a shot and more.. i'd like to know.

/ Max

I don't exactly know.

I know it casts fairly hard shadows, but so would a small (point) light source. It has a nice radial falloff when aimed at a subject, but so would a point source enclosed in barn doors.

One difference between a collimated beam and point source rays is the inverse square law. You don't get ISL falloff from a beam of parallel rays.

Hurrell used fresnel lenses in his glamour photography to very nice effect. But ISL falloff is pretty sexy too.

My main goal is to understand the different looks better, and to 'eye match' live action lighting to Maxwell lighting. (regardless of whether or not the light modifier is literally copied.

[jfrancis]

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[Bubbaloo]

Are reflected parallel light beams cheaper than refracted ones?

Definitely! And you can also adjust the material of the reflector.

[Maximus3D]

Thanks for the explanation and pictures jfrancis, i appreciate it. What this lens do is basically focus the light in parallell rays ? hmm.. that could probably be solved differently with resonable rendertimes and no caustics ruining the image. I add it to my to-do list.

If you're interested in studiolighting then you have these two threads you can take a closer look at.
http://www.maxwellrender.com/forum/view ... 48&t=31458
http://www.maxwellrender.com/forum/view ... 48&t=30870

/ Max

[simmsimaging]

I'm sorry you had an accident or illness, but my point, like Brian's, was intended playfully. You missed both, and now there isn't one left. I'll leave you guys to the original one.


b