Why isn't this in Blender?
I'm having a hard time setting up some lenses in LuxRender, and if it just scattered a couple dozen rays showing me their paths in the viewport, it'd make things so much easier.
It's a free program. What you get for that price is pretty amazing, but that's what you get.
Doing test-renders is just part of life, run a low resolution and low samples configuration while you set it up and ramp up when you're ready for finals.
I'm just trying to use 3D as a tool to assist me in figuring out the required lens and mirror arrangement, I'm merely blaming the program for not having ray path display capabilities.
And as far as I can tell so far, whatever solution I figure out if there is one, it's going to be of no more than 25% efficiency, perhaps won't be able to be focused, and with a possibility of ghost images; so it's not exactly surprising I couldn't find the lens design I'm looking for when other lenses do almost the same job perfectly.
Only reason I'm looking at such an absurd type of lens is because I'm studying ambience transplantation as an architectural concept, and the most stylistic solution is said absurd type of lens.
How about you give us a screenshot or explanation of what makes your lense special, because currently you've given us nothing but vague descriptions and it honestly seems like you're avoiding the topic.
What exactly are you trying to do and with what?
A somewhat funtional but very slow workaround: volumetric material and laser like lightsource.
What I mean:
1. fill the scene with almost invisible volumetric "smoke/fog"
2. use lightsource that has very thin light cone, almost a line
3. apply lences and see where the light is refracted
This would also work in cycles, so it would be easier to test.
im an architecture student and I can tell you having also worked with lenses for projects just make small scale replicas in real life, because no amount of paper work or 3d simulation will be accurate enough to really understand
Having difficulty getting a laser light.
I made a point light and gave it the nodes shown in http://blender.stackexchange.com/questions/1096/making-a-laser-in-cycles-straight-beam-of-light (For the line laser) but it's just lighting up the room perfectly evenly.