All posts relating to Maxwell Render 1.x
User avatar
By tom
#36417
Yeah, Torolf did this test and it's quite beautiful! Thank you TOROLF!
Image
User avatar
By ignacio
#36422
Tom I think there was a compartion with a real picture. Is it right? You have the real test??

Ignacio
User avatar
By tom
#36429
Yes, thank you Ignacio :D

This is a forced dispersion test I've done with beta before release.
I say "forced" because it uses a very low abbe to show the spectrum clearly.
On the top row, you're viewing the original visible spectrum. Bottom row parted into two, the lower part is the original rendering of the reflection screen and the upper part is blured in photoshop to match the result with the original spectrum. The question mark shows the color beyond violet means ultaviolet. I'm not sure if it should be there and it will be checked soon.
Image
User avatar
By Aldaryn
#36437
This was a great test Tom, and its geat to have a correct spectrum.

Btw, I always get distinct bands of colors instead of a soft transition, when I do dispersion tests, is there a way to control how accurate the solution is? Or this is just a small bug right now, and I sholud always get a smooth spectrum solution in time?
Last edited by Aldaryn on Mon Jun 20, 2005 3:23 pm, edited 1 time in total.
User avatar
By tom
#36439
it's all about conditions aldaryn, let's see your tests and look what's going on.
User avatar
By tom
#36443
this i not bug because it's a "forced" test with an extreme abbe number.
as you see in Torolf's artistic output, the prism disperses it smoothly.
User avatar
By Aldaryn
#36445
Image

Really simple, brigth bars behind sphere with abbe 2. :) So, yuo say the banding is only because of the extreme conditions? I've expected to get a smooth transition even in situations like this.
Anyway, I really like the new spectrum. 8)
User avatar
By Aldaryn
#36498
I think none of them, its just an extreme situation, and this is how its now handled.
I doubt that you'll ever need a better specrum resolution in everyday rendering tasks. :)

Still, I would really love to render images like this (WinOSI)
User avatar
By tom
#36519
if you supply same conditions, may took long but it should render the same...
maybe torolf can setup the scene since he's good at winosi :roll:
User avatar
By Aldaryn
#36577
I've downloaded the winosi scene, and gave it a try, but even with an abbe value of 2 the spectrum was not wide eneugh, and some strange artifacts (brigt colorful dots) appared.
Im not really good at optics, so, someone with some free time, and knowledge might give it a try. ;)
By Becco_UK
#36678
Image

This is a photo' I took one day in August, 2003. At the time it was to replicate a natural gradient in an image (that never was finished!).

Kept the photo' thinking it may come in useful another time and here we are in the era of Maxwell Render. - May be useful dispersion comparisons?
By Becco_UK
#36736
lolec: The photo is one of several natural dispersion patterns I see every sunny morning in my living room. On the window panes are a few crystal ornaments, so as the morning sun hits them they create the sort of patterns you see.

This pattern, being cast on the floor, caught my eye so I simply placed some paper on the floor and took the photo'. A drawing would only show me crouching, holding a camera!

I took this because I wanted a natural gradient rather than something computer generated.

It may be worth keeping in mind that first the sunlight went through a single pane of glass before going through the crystal object - this may have affected the result - but some natural rainbow photo's I have suggest the gradient is correct.

A few more photo's would be needed to verify the above gradient.

Let's hope for some sun in the next day or so!

Hello Gaspare, I could test the plugin on Rhino 8[…]

Sketchup 2026 Released

Thanks Fernando, Your suggestion works perfectly […]

Hello, I'm sorry for the late reply. Hopefully, t[…]

Hello Blanchett, I could reproduce the problem he[…]