d7man2000

I have a basic scene with 3 buildings and glass in each building. When I render it takes long time like crazy. I used Mental Ray and it didn't take that long.
Please tell me what am I supposed to do. I want to create an animation.
I have 4 computers to do this. Even with distributed rendering it takes a long time to calculate each frame.

manta

This might sound silly, but why don't you use mentalray then...

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AJLynn

Ray trace depth? Glossy reflections? Subdivs? There are a lot of way of making your render slow, but if your settings are comparable the speed should be comparable - they are both great raytracers, if anything Vray can be a bit faster.

d7man2000

vray is super slow in comparison to Mental Ray.
for exterior scenes with buildings that have reflective windows , Mental Ray is very fast , with Vray I am waiting and waiting, I reduced the settings but it is too slow.
I thought I would not miss Mental Ray but MR is a pretty powerful program, I can't get used to Vray, I got decent stuff done with Mental Ray, less settings, more efficient.
If anyone knows how to get a short render time please let me know.
I reduced the subdiv, refl. depth, it is still too slow.

crazy homeless guy

you should post your settings so people can help you.

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manta

Sounds like you should stick with mental ray, hey how about posting renderings of the scene, one with vray and one with MR to see if the extra time you're waiting is worth it...

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Timothy Saunders

I'm with Travis. If you don't show us some test renders and let us know what settings you're using and/or how you have made your materials, there is no way of knowing what steps to take to speed up your renders. Like mental ray, there are a dosen different directions to go to get quicker renders. You first need to figure out what is actually making it take so long before you change every setting.

d7man2000

this project I am working on is a proposal so I am not supposed to show it.
I did tests of both Vray and Mental Ray and I am gonna stick with Mental Ray.
It does Global Illumination very nicely, I can't tell a difference really. I cranked up AntiAliasing and FInal Gather and I use 1 directional light, 1 Sunlight and I am happy with a result. I am more efficient with 2 computers than 6 with Vray. I get Final Gather calculation of 250 quality quickly and rendering is quick too at 720x500.
One thing that pissed me off with Vray(with Mental too but less) are blotches,
you have to crank up the settings really high or use VRmap where you render multiple times but it takes time.
Anyway, in this case Mental Ray wins.
I have to render about 2000 frames of exterior buildings with reflection and refraction.
I will post settings soon, I have to finish when machines finish renderings, it should be today. I get something like 30 frames per 10 minutes of rendering.

d7man2000

here is my Vray Setting

maybe a key is a setting of interpolation of reflaction and refraction

we must to get to the bottom of this to optimize the Vray use for every purpose.

Attached Images

	setting1.JPG (45.1 KB, 68 views)
	setting2.JPG (54.0 KB, 60 views)
	setting3.JPG (39.7 KB, 62 views)
	setting4.JPG (34.2 KB, 49 views)
	setting5.JPG (48.6 KB, 58 views)

AJLynn

Wow. Okay, you have some settings here that are killing you. You need to go learn more about Vray settings before straying too far from the defaults.

The antialias max at 3 is probably unnecessary, the QMC Sampler settings are WAY too high, and the glass is pretty strange, I'm not sure what effect you are going for but maybe you could use the egz materials - go to http://vray.info and get the "Beta Collection" under Materials on the left. Change all your settings back to defaults and start doing some Vray tutorials. If you watch Chris Nichols DVDs (go to the Shop link above on this page) you'll get a lot on sampling rates and QMC settings.