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Visualising ray paths

Anonymous Thu 08 Oct 2015 06:11:44 No.497086 View Reply Report Delete

Quoted By: >>497088 >>497120 >>497271 >>497840 >>499981

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.

Anonymous

Anonymous Thu 08 Oct 2015 06:19:44 No.497088 Report Delete

Quoted By:

>>497086
Also, the OP image had a string of numbers and letters removed which somebody later told me was to do with a video of a cat getting fucked by a dog.
Is this true?

Anonymous

Anonymous Thu 08 Oct 2015 06:29:31 No.497089 Report Delete

Quoted By: >>497095

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.

Anonymous

Anonymous Thu 08 Oct 2015 06:59:00 No.497095 Report Delete

Quoted By: >>497104

>>497089
But that doesn't show me the ray paths.

Anonymous

Anonymous Thu 08 Oct 2015 08:01:37 No.497104 Report Delete

Quoted By:

>>497095
C'est la vie.

Anonymous

Anonymous Thu 08 Oct 2015 08:16:38 No.497120 Report Delete

Quoted By: >>497121

>>497086
>Visualising ray paths
you can't estimate straight fucking lines?

Anonymous

Anonymous Thu 08 Oct 2015 08:20:28 No.497121 Report Delete

Quoted By: >>497122 >>497229 >>497252 >>497255

>>497120
I'm trying to figure out if a certain type of lens is physically possible.
/sci/ says it isn't, but they've gone /b/-tier stupid of late, and kept suggesting cameras.

Anonymous

Anonymous Thu 08 Oct 2015 08:23:06 No.497122 Report Delete

Quoted By: >>497124

>>497121

>sci straight up tells you that you can't do something
>can't seem to do it with 3d
>complains about the program

Mkay.

Will this also change the face of reality forever if you succeed?

Anonymous

Anonymous Thu 08 Oct 2015 08:34:15 No.497124 Report Delete

Quoted By: >>497151 >>497153 >>497333

>>497122
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.

Anonymous

Anonymous Thu 08 Oct 2015 15:07:52 No.497151 Report Delete

Quoted By:

>>497124
And you're asking this from a free piece of software.

Anonymous

Anonymous Thu 08 Oct 2015 15:36:30 No.497153 Report Delete

Quoted By: >>497195

>>497124
Fake it. You won't learn anything useful from a digital representation.

Anonymous

Anonymous Thu 08 Oct 2015 23:14:45 No.497195 Report Delete

Quoted By:

>>497153
It's much easier working with optical simulation tools than doing everything in my head.

Anonymous

Anonymous Fri 09 Oct 2015 10:01:06 No.497229 Report Delete

Quoted By: >>497236

>>497121
>certain type of lens
you would need to code for that.
i'm pretty certain no 3d program comes stock with separate ray tracers for different lenses.

Anonymous

Anonymous Fri 09 Oct 2015 10:41:58 No.497236 Report Delete

Quoted By: >>497240

>>497229
The fuck are you talking about? Different lenses don't require different raytracers. The rays don't give a shit. If's about curvatures of the object.

Anonymous

Anonymous Fri 09 Oct 2015 11:02:49 No.497240 Report Delete

Quoted By:

>>497236

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?

Anonymous

Anonymous Fri 09 Oct 2015 12:14:56 No.497252 Report Delete

Quoted By:

>>497121
Of course it is
The question is: Can it be produced cheaply

Anonymous

Anonymous Fri 09 Oct 2015 12:18:57 No.497255 Report Delete

Quoted By:

>>497121

Considering how bad you're at explaining it, I'm not surprised they got the answer wrong.

Anonymous

Anonymous Fri 09 Oct 2015 13:37:30 No.497271 Report Delete

Quoted By: >>497417

>>497086
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.

eggplant

eggplant Sat 10 Oct 2015 00:52:31 No.497333 Report Delete

Quoted By:

>>497124
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

Anonymous

Anonymous Sun 11 Oct 2015 02:30:26 No.497417 Report Delete

Quoted By: >>497708

>>497271
I tried this in LuxRender before making this thread, couldn't get anything clear enough.
Maybe internal render or Cycles would work well though.

Anonymous

Anonymous Sun 11 Oct 2015 14:27:44 No.497506 Report Delete

Quoted By: >>497562

Did you try using the laser light option?

Anonymous

Anonymous Sun 11 Oct 2015 21:32:44 No.497562 Report Delete

Quoted By: >>497708

>>497506
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.

Anonymous

View Same Google ImgOps iqdb SauceNAO Capture.jpg, 28KiB, 267x398

Anonymous Mon 12 Oct 2015 20:22:01 No.497708 Report Delete

Quoted By: >>497820

>>497562
Sorry I meant in Luxrender. I mean't to quote >>497417
but deleted the post number by accident.

The laser light option is under the area light. Only for the Luxcore2.0 API.

Anonymous

View Same Google ImgOps iqdb SauceNAO untitled.png, 617KiB, 960x540

Anonymous Tue 13 Oct 2015 22:44:02 No.497820 Report Delete

Quoted By:

>>497708
Alright, working!

Anonymous

Anonymous Wed 14 Oct 2015 01:04:18 No.497840 Report Delete

Quoted By:

>>497086
>Why isn't this in Blender?

nigga. when did you spend something for blender foundation last time?

Anonymous

View Same Google ImgOps iqdb SauceNAO Promotions.jpg, 7KiB, 180x211

Anonymous Wed 28 Oct 2015 00:49:26 No.499981 Report Delete

Quoted By:

>>497086
>1437110717700.jpg

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