Maxwell Vs. Mental ray - Page 2 - Simply Maya User Community

# 16 23-07-2008 , 04:16 PM

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Ok, I did one with more materials. same materials and lighting in each, and the only thing different is the angle of the HDR because each renderer interprets the HDR in a different way.
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And before other people say it, I know mental ray doesn't need the settings that high to look the way this render does, but as I said before, maxwell automatically does, so its only fair. for all intents and purposes, this is a test to see which is faster on an average computer, For the maxwell one, if I had rendered it for just 10 more minutes, the noise you see would be gone, but I had already set it to end in 20 minutes.

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# 17 24-07-2008 , 12:25 AM

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I fail to understand the purpose of this test... why does it matter which one is faster?

It also appears that mental ray has better quality, at least in the latest test. The results have more depth, the shadows look more realistic and have are more dynamic and looking at my own desk and the shadows it casts (its sunset atm), mental ray's results do look somewhat similair.

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# 18 24-07-2008 , 06:16 AM

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Ok so I guess just out of curiosity you wanted to see which was faster on pretty much max settings rather than practical settings, problem with that is that you set a 20 min cap for Maxwell while MR is left to actually complete the image. And in this particular case your Maxwell time is probably going to end up closer to the MR time if you decide to correct the weirdness with the geometry for the drawers and get the noise completely out.

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# 19 24-07-2008 , 07:59 AM

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I think to accuratley test them you would have to set the mental ray scene up better. Just setting things up to the right dosn't mean it is the right setting. If the renders treat certain lighting setups differently you should compensate.

Im also not sure what it is you are trying to test? Becase if you are testing speeds i would think that the end result would have to be identical. At the moment the pictures are too different to be accurate. Showing two completley different pictures and saying one is superior because it is faster is not accurate. If you could show me two Identical Pictures and say that one is done with Mental Ray and the other is done with Maxwell then maybe the test will have a point.
At the moment it just looks like you are trying to make Maxwell look much better than Mental Ray.

Just my little opinion

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# 20 24-07-2008 , 11:35 AM

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The whole point of this post (which I now give up on, haha) is too disprove the myth that maxwell is amazingly slow compared to other renderers. If I had left either render for 2 more minutes, the noise would be gone too.

The problem is, maxwell bases everything on how real light interacts, but mental ray goes off of what YOU want the lighting to look like, in a way. this means it would be VERY hard to get the images to be exactly the same. The main difference between the 2 in the 3rd image is the angle and interpretation of the HDR by the renderer. Mental ray's image turned more pink because of it, but maxwells didn't. its just the way maxwell uses HDR. They were as close as possible though, with an identical lighting set-up, and the same HDR, so I don't see what the fuss is about. As I said though, everyone thinks maxwell is a waste of time because of how long it takes. I was just trying to show it isn't nearly as slow as most people think, and it could be used for animation.

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# 21 24-07-2008 , 10:32 PM

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Maxwell does not behave like real light. I don't think any commercial renderer behaves like real light. Renderers however do try to act similair to real light. My understanding is that Maxwell fires off a few rays to find out which bits are solid and then guesses the color values of the everything around it before doing a bit more raytracing to find out how good its guess was. That is hardly how real light behaves. If one wants to test the "realism" of Maxwell, one should write a renderer that traces the path of every photon and its interaction with air molecules, dust particles and the surfaces of materials at a molecular level and compare the results (after a few months of rendering at a large supercomputer) with Maxwell. I'm very confident that one will find the results to be different.

OK, what I just said sounds like technobabble from Star Trek, but I hope it does give an idea of how far Maxwell is from simulating real light.

Also, I suspect the reason why mental ray is so slow is becuase it wasn't tweaked. Tweaking is very important.

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# 22 25-07-2008 , 12:30 AM

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I think that MR works in a similar way.

As people have said tweekning the render in MR is part and parcel of using it, If you tweeked the settings I bet you could get it faster than maxwell with very similar results on the MR render.

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# 23 25-07-2008 , 08:34 AM

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I would be more convinced with the tests if you did the mental ray one, and then took that same amount of time to do the maxwell render, that way they're rendering the same amount of time, then we get to decide which one looks better

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# 24 25-07-2008 , 10:36 PM

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Originally posted by gster123
I think that MR works in a similar way.

As people have said tweekning the render in MR is part and parcel of using it, If you tweeked the settings I bet you could get it faster than maxwell with very similar results on the MR render.

Originally Posted by

Maxwell and MR are both raytracing renderers, but I think they use entirely different methods to make raytracing more effiecient and to add all those fancy effects.

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# 25 26-07-2008 , 01:40 AM

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Originally posted by The Architect
Maxwell and MR are both raytracing renderers, but I think they use entirely different methods to make raytracing more effiecient and to add all those fancy effects.

Originally Posted by

Yes I know.

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# 26 26-07-2008 , 01:54 AM

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Originally posted by gster123
Yes I know.

Originally Posted by

I was pretty sure you did, but you did say, "I think that MR works in a similar way." in a previous post...

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# 27 26-07-2008 , 02:18 AM

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Yes there both Raytracers. Obviously there different when it comes to calculating specific parts, but the overall theorys are similar.

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# 28 26-07-2008 , 07:13 AM

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joopsoon, stick with Mental ray. The longer wait is worth the effort and the renders will look better.

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# 29 26-07-2008 , 12:26 PM

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but, Maxwell gets better results for stuff, if I tweak it a bit. It also allows me to change the lighting when its done. Much more effective. plus you know if its gonna suck the moment it starts rendering the scene.

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# 30 26-07-2008 , 12:52 PM

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Originally posted by Joopson
but, Maxwell gets better results for stuff....

Originally Posted by

Haha I like the choice of words, "stuff". Well it all comes down to personal preference, if you feel its the renderer for you then by all means have at it. I just don't see myself shelling out $$ for Maxwell anytime soon when MR gets things done.

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