Cut Crystal Tests

[zsouthboy]

can't the regular AMD/Phenom desktop chips run in dual CPU?

That's the way I would go myself - save some bucks

Nope. No dual or quad-cpu action, from either Intel or AMD, without paying for a "2" or "4" capable cpus (Xeon or Opteron)

[WytRaven]

I just compared my Cauchy curve for BK7 against the graph on wikipedia. My curve behaves the same vs the measured data as the one on wikipedia. I am now 100% sure I have the A and B calcs perfect now. I've only changed one thing since last post of the spreadsheet and that was switching the 'n' in the A calcs from the median of nD and nd to the mean of nD and nd (which is what I originally intended but had a brain fart ).

EDIT: Decided to go back to meassured nd for the A calcs, made more sense. Updated link to version 13.

Link removed, new link further down.

[WytRaven]

Render update:

bidirectional: 1
width: 1920
height: 1200
super_sample_factor: 2
hybrid: 0
metropolis: 1
num_threads: 2
large_mutation_prob: 0.40000
max_change: 0.01000
max_num_consec_rejections: 1500
maxdepth: 15000
ray_origin_nudge_distance: 0.00001

num_samples: 25915570000.00000
render time elapsed: 601386.28205
samples_per_pixel: 11248.07726
samples_per_sec: 43093.05146

It's actually getting pretty close to convergence now

[zsouthboy]

Well, that beats me for longest render - longest i've gone is a week (then again, no cauchy in that scene)

[WytRaven]

It's really facinating watching this scene evolve. Every time I think it's moving toward convergence indigo finds some new detail to start working on. Its over 175hours now and all of a sudden some brand new caustics just started showing up

[BbB]

You guys are mad

[WytRaven]

I'm actually really peeved that I din't put more effort into the scene setup now. What was supposed to be a simple test has grown into aa render marathon and unfortunately the end result whilst being technically cool will make for a flawed render due to the crapy scene.

I promise my next 200 odd hour render will be a good picture as well as being technically cool

[WytRaven]

Here's a pretty comparison of my calced values for BK-7. The comparison from wikipedia shown first:

Wikipedia values:
A: 1.5046
B: 0.00420

My Values:
A: 1.50457412559239
B: 0.00422072479206567





Considering that wikipedia doesn't show the values they calculated their A and B from it's no surprise that the numbers aren't eactly the same but you can see from the graph that the curves are behaving the same. I think it's safe to say from this that the method I am using is correct.

[Stur]

It's really facinating watching this scene evolve. Every time I think it's moving toward convergence indigo finds some new detail to start working on. Its over 175hours now and all of a sudden some brand new caustics just started showing up

All of a sudden you're going to have an electricity cut while Indigo is saving and your .igi will be fucked up

You should backup your .igi sometimes if you don't already do

[WytRaven]

Dude! Don't say things like that *touches wood*

[Kram1032]

But he's right xD
you should copy your igi into an other folder, so that it's saved, there
Not all that long, to finish your 200, any more

[CoolColJ]

maybe you should make sure the pic actually looks the way you want at a smalll res before you render out a massive one

[WytRaven]

As per request Ono, n vs λ^-2 for BK7 using my calculated A and B coefficients.

[WytRaven]

BK7 meassured n vs λ^-2. Meassured n wavelengths are from 1060nm -435.8343nm

[Kram1032]

why are the wavelengths in 1/λ² ?
What about a 3D-net comparison? I think, Excel has that, too, doesn't it?
then, you can compare 3 datas at once ^^