I tried to make the overall scene and light setup very simple, just to reduce the number of factors that could enter in the game. V-ray also has its own GPU render engine (V-Ray RT) used for IPR renders. You can use V-Ray with almost any 3d software thanks to their very well written plugins. It can use traditional biased Raytracing (global illumination, photon mapping) or Brute Force unbiased algorithms. V-Ray is used in media, entertainment, and design industries such as movie, industrial and product design, video games and architecture. V-Ray is probably the most famous and used render engine nowadays. It is developed by Chaos Group (Bulgarian: Хаос Груп), a Bulgarian company based in Sofia, Bulgaria, established in 1997. Anyway a big part of the render computing is still CPU based, I hope to see some big steps toward the full GPU utilization. With this new GI model, Mental Ray can use the power of CUDA to compute the indirect/global illumination on GPU.
We saw concrete results just in 2015 when the new GI NEXT was implemented. Mental Images was bought in December 2007 by NVIDIA, trying to bring some freshness to the old Mental Ray. In 2003 Mental Images was awarded an Academy Award for their contributions to the mental ray rendering software for motion pictures. It has been used by the industry and professionals for over 28 years (the first release have been built in 1989 by Mental Images), Mental Ray has become a standard for photo realistic rendering across the film, visual effects, and design industries (Hulk, The Matrix Reloaded & Revolutions, Star Wars: Episode II – Attack of the Clones, The Day After Tomorrow and Poseidon are just few examples of products made using Mental Ray). Mental Ray is a feature-rich, programmable, biased ray-tracing render engine. We are going to compare these render engines in various aspects, this is a work in progress review, so I will add more tests in the future. Anyway Mental Ray 2017 puts on the table some very good features at a cheaper price than V-ray. Mental Ray had a very slow development in the last 4-5 years and it didn't get any exciting new feature or update. The battle Mental Ray VS V-Ray started many years ago and it seems that v-ray won in any aspect so far. After the NVIDIA anticipations about the departure of Mental Ray and iray rendering as integrated render engines for Maya and 3SMax, many users started to ask themselves what could be the best render engine to pick for their renders.
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