Raydiant: chasing the rainbow

2009-12-14 at 19:42 | Posted in Computer path | 2 Comments
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This is the first sample render of Raydiant using spectral sensitive materials. In this case some crystal triangular monoliths are responsible for the rainbowish thingy. I’ve developed a spectral pathtracing method, no photons are traced from light sources (no photon mapping), so light sources can be arbitrarily numerous and heterogeneous and render goes just even faster. Total internal reflection is also modeled, hence the secondary rainbows apparently going against the unique light source. I’ve spent long time staring at every different light effect on each zone of this particular render, I like them. So from now on Raydiant is a spectral pathtracer. The monoliths are made of glass with refraction index 1.4 to 1.6 for all the range of visible light. I’m working on speeding it up by a factor of 20 times and it’s looking good. The second image with square monoliths is another test posted for aesthetic reasons.


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  1. First thing first ,i would like to say that your work is a great inspiration for me and anybody who is interested in CG, so BRAVO.
    Second,i’m curious to know whether Raydiant is supposed to be a photorealistic renderer or not.If yes then i presume that you have a lot of work left to do because my brain tells me that all of your renders are computer-generated (which is actually true :D)

    P.S:apologies for my bad English

  2. Thanks man! Not everybody can appreciate this things and every time someone enjoys one of the images it makes the work a little more worth while.
    You’re right, a lot of work is jet to be done on the engine, I’ve a long to do list.
    Anyway consider also this: there are at least 2 main reasons a synthetic image doesn’t look real, first a faulty renderer and second the image content may not seem real any way. Having said that you may considered trying this, show this image https://albertordmr.files.wordpress.com/2009/11/monolith_coil.png to a friend and tell him it is a photograph taken from some obscure art Gallery and check if he buys it. I got away with this many times (with Computer geeks and graphic designers). But may be I’m just a good seller 🙂 . To increase your fun explain that it took 3 months to put in place the smallest monoliths. Good luck!
    PS: if it fails try with this image https://albertordmr.files.wordpress.com/2009/11/mar.png

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