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Mental Ray Rendering V/S Iray

Mental Ray rendering is one the most commonly used rendering worldwide. Most softwares includingMax, Maya, Softimageetc have this as a rendering option. While Mental Ray of Mental Images is quite

known, their latest is Iray rendering. The computation on Iray is more inclined toward GPU calculation

compared to the Mental Ray which is more CPU intensive. This creates a major confusion in the minds of

many user who will wonder how can a GPU process be any faster than a CPU. After all one can have

multiple CPUs and these can even be a dual core or a quad core.

First of All when setting the iray render, the option are minimal.

(pic)

The most preferred is unlimited, in this the process continues till the user intervenes, to stop the render.

Of course, on can specify the number of passes (iterations) or specify the amount of time it should

render.

To give a simple perspective on this.

Below image rendered using Iray in 1 min and 4 sec

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Below image rendered using Mental ray in 1 min

So far it seems like mental ray render works far better in quality than the grainy Iray render. But notice

here the interior walls are pretty dark and no details can be seen in the mental ray image as compared

to the Iray rendered image.

Below image rendered in 2 min and 18 sec

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Above image render in Mental Ray taking about 1 hour

Note that the number of bounces was increased also the number of rays.

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Lastly iray rendered in 4:35 minutes

Also notice the very subtle reflections in the glass

Digitally signed by Prem Moraes

DN: cn=Prem Moraes, o, ou=ACE,

email=prem.moraes@gmail.com,

c=IN

'Date: 2011.09.13 17:10:11 +05'30