> aš apie 3ds max nieko nenusimanau, brolis kažkiek, bet jis dizaineris, jam sunkiau su visokiais programų aprašymais (ir su anglų 
> kalba taip pat, deja)...


nu tai tavo brolis, tai tavo ir problemos :))

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Galu gale tavo linke:

>> čia rašo, kad turi veikti
>> https://www.reddit.com/r/3dsmax/comments/52nw9p/cpu_vs_gpu_rendering_performance/

<..> GPU rendering would be useful for Octane or Fstorm.

https://fstormrender.ru/checkout/

https://home.otoy.com/render/octane-render/purchase/
https://home.otoy.com/render/octane-render/demo/

The OctaneRender Autodesk® 3ds Max® Plugin Demo has the following limitations:
 * Render resolution output is limited to 1000×600 pixels
 * Render output contains water marks (Octane logo and stripes)
 * Online LiveDB material database functionality is not included
For installation and usage instructions please consult the 3ds® Plugin Manual
https://docs.otoy.com/3DSMaxH/3DSMaxPluginManual.htm#3DSMax/Installation.htm

Na ir dar vienas klausimelis.. buvo tame 3ds Max'e nueita iki cia:
https://docs.otoy.com/3DSMaxH/Resources/Images/3DSMax/Installation_Fig03_3dsV3-08RC3_5-04.png
paziureta kokie ten renderiai siulomi ir ar bandyta rankiniu budu kazkokius konkrecius nustatyt?