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schwungsau

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Posts posted by schwungsau


  1. having some fun with particles....

    birth of a massive star. for my little #astrophysics exploration, i’ve created a star simulation using openCL in houdini. its based on nbody #physics model, only driven by #gravity. using #nvidia #quadro rtx 5000 #arnoldrender. 

    the colours are not quite right, I am trying to integrate kelvin colour temperature.  the current colour is based on density and speed.  

    In this simulation, I assumed  48% amount of negative gravity to fill the mystery of dark matter. I used 1 million nbodies for the simulation.  for the steps, I am planning to add finer particle streams to get more details.

     

     

    fast particle rendering with path tracer is hard !

     

    sun.jpg

    sun2.jpg


  2. its the setup quartz crystal from entagma, but with arnold spectral refractions and Dielectrics  i just need "glass" shader. no hacks or tricks needed. (renderman should able to do the same)
    i am planning to different kinds of crystals.
     

    Capture.JPG

    Capture1.JPG

    • Like 1

  3. its older but thats a hypercube with glass shader in arnold with fake caustics, its quite fast. (6 minutes)

    5thcube_v002a-2.jpg

    5thcube_v001.jpg

     

    same cube with physical correct light simulation in Indigorender, true caustics. it renders in 2 hours, but at least 10 faster than any path tracer (CPU or GPU) without fake.

    5thdemension_v003b-1.jpg

     


  4. once i access to my workstation again i can share the hip file. but tis pretty the same seen in the vimeo video, its a classic mandelbrot, no secret behind it. 


  5. i stick with out of the box workstation, i wasted too much time in past with crashes, fixing hardware etc...

    i have a lenovo workstation, i got a 65% discount. hard to beat. lenovo has also the first pro threatripper workstations. you can buy used dell or HP workstation on amazon or ebay. it has every-running xeon's, you can get good machine for 800$+ then all you need is upgrade the ram and get modern GPU card.  


  6. oh no you ask the wrong question, there is a lot hate here around out-of-box workstation.
    if you want a good workstation for good price. lenovo currently have 40-65% off promotion on workstations.

    ok, now lets see now many post will appear here to talk you out of it, because you have build by yourself, because its the only way.


  7. testing Arnold 6 in Solaris for lookdev in Solaris. its has really potential and its fun to work with, only a Arnold render HDA is missing. Pixar provide one, but its easy to build a renderROP HDA. 

    the scene was running on my Thinkpad

     

    arnoldcpu-1.jpg

     

    GPU renderspeed comparsion with indigorender

    comparsion2.jpg?w=1298

     

    close up with indigorenderer
    arnoldgpu.jpg


  8. best way is mess it out as tiny tubes, if you specular hights is important for you. but its atr 12 times more data and memory.  you need a renderer with great splines primitves/shaders, Arnold and Renderman are the best bt far.


  9. RenderMan is like most modern render engine. with path tracing you getting very good results but RenderMan is the most flexible render engine. if wanna speed your render 3 times or 10 times, you can dig into a rabbit hole. so have completely understood the rendering at the beginning, only if you optimize hell of it, you will learn/need different techniques (bi directional path tracing, manifold etc...) but this makes rendering like 4-5 times faster then Arnold/karma.

    thats a good start :

     

    for optimizing etc... Pixar Renderman sites have some good tutorials.

    and there are dozen of sites, which teach physicals based shading etc... it applies to all modern render engine

    https://marmoset.co/posts/basic-theory-of-physically-based-rendering/

     

     

    • Like 1
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