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Playing around with VRay
show user profile  Coxy
So, I recently took the plunge and got it and have spent a few days messing around with it. I took an old scene of mine and just redid it all in Vray and this is the result. Let me know what you guys think, especially you Vray boffins. I have attached the old and the new version, I am also going to animate this model in time for my showreel.

Mental Ray

read 1957 times
9/18/2012 6:38:42 PM (last edit: 9/19/2012 5:16:37 AM)
show user profile  zeefusion
Highlights too strong IMO. they need to be somewhere between the top and bottom pic.
read 1879 times
9/19/2012 9:19:23 AM (last edit: 9/19/2012 9:19:23 AM)
show user profile  herfst1
Agreed. I think the vray version is a lot sharper, hence better but maybe the lighting is making it look more CG. The mentalray one is darker and more grimy looking, which suits the model more.
read 1871 times
9/19/2012 9:58:37 AM (last edit: 9/19/2012 9:58:37 AM)
show user profile  rob@dynamic
I'm no vray expert... so maybe way off here...

but what aa filter you using? It looks a bit too sharp in my opinion.

3D Portfolio

read 1868 times
9/19/2012 10:35:30 AM (last edit: 9/19/2012 10:35:30 AM)
show user profile  reeves1984
Looks nice! No comment on the vray part as it looks fine.

Only comments would about the actual look because of the really large really bright reflection, where as the rest looks nice. BUT that's just because of the HDRI, in fact there is detail in there isn't there? Clouds etc. Maybe you can sort that out in post with some curves

BUT don'r use that HDRI, because it's been super over used and instantly recognisable (by 3d people anyway)

Simon Reeves - VFX Artist & Blog
twitter <-- I work here

read 1853 times
9/19/2012 12:23:58 PM (last edit: 9/19/2012 12:24:43 PM)
show user profile  9krausec
you should rotate your HDRI 90 to match the top one. I like the way those reflections lay better.

Just saying, awesome stuff though!

- Portfolio-

read 1830 times
9/19/2012 2:48:06 PM (last edit: 9/19/2012 2:48:06 PM)
show user profile  Phil Gornall
I am way out of my league here. Both images above are absolutely amazing in my eyes.

as a complete amateur compared with the other experts, I actually prefer the MR image.
The Vray one looks over saturated with light. That is the sum of my knowledge.

and.. wow.. just wow.. what a nice piece of work.
read 1808 times
9/19/2012 4:41:13 PM (last edit: 9/19/2012 4:41:13 PM)
show user profile  Phil Gornall
I was tempted to post a photograph on here and ask for Vray tips on getting better lighting, just to see if someone posts a comment about improving the render...

The standard of work on these forum's is amazingly high. This roman helmet is such a high standard, I can only drool at achieving that level of realism.

read 1799 times
9/19/2012 5:22:32 PM (last edit: 9/19/2012 5:22:32 PM)
show user profile  Coxy
Cool, cheers guys I'll make the edits, especially the HDRI map. Have been wanting to change that for a while as I know how visible that one is, so for the animated model it definitely needs to go.
read 1743 times
9/20/2012 5:20:24 PM (last edit: 9/20/2012 5:20:24 PM)
show user profile  digital3ds
how would you compare it to mental ray - do you like it better yet? Think you'll like it better?
- Mike Sawicki

read 1723 times
9/20/2012 7:00:12 PM (last edit: 9/20/2012 7:00:12 PM)
show user profile  Coxy
So from the small time I have spent with it, VRay feels a lot more intuitive, I have noticed the difference mainly in the Vray Materials, it all just feels a lot more flexible than MR. It feels to me (albeit only with a few days of playing) that you need to be a lot more gentle with the material settings in VRay.

Brute force option also seems to give some interesting options in regards to animation. The image above was done with set sampling at 4, with both primary and secondary on brute force and it took about 25mins at 1920x1080. I'm going to start mixing BF with Light Caching though once I do some animated stuff (Thanks to some tips from Bolteon) and then see how it all looks.

Also to answer about the AA filter, it was set to triangle, so I might play with area to try and smooth the image out slightly and not go overkill on the crispness.

So far I am liking it a lot, it feels lot more fun to play around with than MR and even just some of the little things like having the rendering buckets following the mouse cursor for example are just cool.
read 1706 times
9/21/2012 1:21:55 AM (last edit: 9/21/2012 1:25:47 AM)
show user profile  Coxy
Spent some more time on it last night, dimmed a few of the materials down, changed the HDRI and changed filter.
read 1644 times
9/22/2012 8:48:16 PM (last edit: 9/22/2012 8:48:16 PM)
show user profile  herfst1
This crit depends on whether you're going for a "restored" look or a "found object" look.

The nose piece sticks out to me as looking too gold, too new. This is probably true of the rest of the gold. If you look at the MR render it had more of a dirty bronze feel to it. Also the specular of the silver is maybe a tad too strong; possibly lower the glossiness or the Freznel.

Actually, what are your material settings?
read 1633 times
9/22/2012 9:31:11 PM (last edit: 9/22/2012 9:31:11 PM)
show user profile  Coxy
Well, the point was for it to look like it had been freshly made/ready for ceremony. It would have been heavily polished. My material settings for the straight gold is:

Reflection: 200 200 200
Gloss 0.9


Reflection 150 150 150
Gloss 0.8

For the cheek pieces it is based on a map for both reflection and gloss that caps out at about 70% reflection and the minimum is 5%. The gloss map is between 5-90% gloss. Panels have a similar map but that caps out at 50% reflection I think.

Everything has a Fresnel with IOR of over 25. I know that the Fresnel effect on metals is very minute, but my understand is that it is still there?

Looking at the reference, I think that the cheek piece needs to be more yellow in colour.
read 1630 times
9/22/2012 9:38:07 PM (last edit: 9/22/2012 9:43:03 PM)
show user profile  herfst1
Okay. Take into account, I'm no expert.

I'd drop the freznel down a lot. The maximum I'd use for metals is probably 10. Also it might help to add some goldish colour to the reflection as the higher it is the less the diffuse colour will show.

[edit] Don't suppose you could post a pic of the reference? I'm just curious to see how it compares.
read 1622 times
9/22/2012 9:45:59 PM (last edit: 9/22/2012 9:48:06 PM)
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