Rendering quality between MR and Vray

[Greg Law]

I'm new to Vray but I have been doing 3dsmax MR images using sketchup models for a while now.

I just did my first project using Vray. It is an revised design of an existing project I did using MR images. The diffence is huge. The MR images are much sharper and the colours are realistic as far as I can make them at this stage. On the other hand my new Vray images are blurry and have a really bad colour cast on them. They look more like sketchup images.

I'm sure it is user fault. I've done lots of tut's to get this far including CG school ones. So it is very depressing to see this quality.

Can someone help me get an image more like the MR one using Vray.

I have put an example of both MR and Vray images here.

 

programs used 3dsmax 2012 design, Vray 2 last update before the 2013 update.

 

VRAY INDIRECT ILLUMINATION = ON

Irradiance map set to medium

Hsph subdivs 20

Interp sample 100

Light Cache Subdivs 1000, sample size 0.02, rest default

DMC sampler adaptive amount 1.0, Noise threshold 0.005

COLOR MAPPING

HSV exponential

clampout put = ON

Sub-pixel mapping = ON

Effect background = OFF

Antialiasing Filters Catmull Rom

Adaptive DMC min 3 max 5

GI environment override= OFF

Reflection/Refraction environment override =ON swatch color = light blue

Refraction environment override = OFF

GLOBAL SWITCHES = default

SETTINGS

Vray DMC sampler

Adaptive amount = 1.0, Noise threshold = 0.01, Rest default

ENVIRONMENT AND EFFECTS

Background color = black

Environment map on with a personal sky map in it.

GLOBAL LIGHTING

Tint swatch = white , level 1.0

CAMERA

Focal length = 30mm, F number = 11.0,Shutter speed = 100,Film speed = 100

GAMMA LUT

Gamma =2.2

Bitmap files

Input =2.2, Output =1.0

Edited May 14, 2012 by Greg Law

[CliveG]

I think you'll probably need to post your render settings to get any concrete assistance, it'll be guesswork otherwise.

 

Cheers

[Ismael]

The image only needs a White Balance correction and better shadow quality...

[Cjmcphail]

What Image sampler are you using for Vray?

[Greg Law]

Thanks for the help. I really want to get this right. I have added the settings to the post.

Where do I find the white balance and shadow setting?

I have a week of full time self training ahead of me this week. So I'm going to be back asking questions.

 

Another thing I have noticed. The Vray material convert isn't working at all with my sketchup imported models. Is this normal or is it a case of multi-texture issue with vray in general.

[Ismael]

http://www.spot3d.com/vray/help/200R1/

 

White Balance

 

See VrayPhysicalCamera section.

 

Sun Shadow

 

See VraySun section.

[John Dollus]

looks like you have Max gamma setup correctly only if you are using Linear or Reinhard color mapping in vray and set vray to 2.2. I would suggest you change from HSV to Reinhard. Switching that can certainly affect your colors and contrast quite a bit

[Andrew_Ryan]

Agree with above comment about Reinhard or Linear Multiply.

I would also say the textures need work. There seems to be no detailed bump or reflections/spec on anything.

This will greatly improve the look of your renders.

I think the images lack contrast. You have some fairly dark shadows under the trees but no real white point to contrast that. Maybe adjust the burn value if you choose to go with Reinhard Colour Mapping.

[Greg Law]

Thanks guys. This is my latest effort. In this image I have looked at the white point, the illumation and focal distance.I still have a long way to go but I think I'm heading in the right direction.

I agree about the material. I'm just trying to resolve one this at a time. Basicly these images where just a quick render of sketchup models. However I'm trying to move on from that limit now. I plan to look into Reinhard tomorrow and Linear Multiply work flow later in the week. [ATTACH=CONFIG]47617[/ATTACH]

[Corey Beaulieu]

I think that a few of your settings you have listed are strange and that perhaps sticking to the defaults for a few things first could help. The first that jumped out at me right away was the Irradiance Interpolation settings. As a rule of thumb this number is typically half that of the hemispherical subdivisions and here you have it listed at 5x as much. I don't know exactly what this oversampling would do, but I know it is adding to your render time. Try 50 HSPH and 25 Interp.

 

The second is you GI/Sky setup. I think if you are just beginning to look at the differences you should simply use a vray sky. In the GI override put a vray sky map and instance that into your reflection override as well. Leave the refraction off. This will help with your shadows (though uping the subdivisions on your sun will help too) and it will help with the overall lighting balance. You may see extra blue from this, but to Ismaels point, you can adjust it with the cameras white balance.

 

I hope this helps. There is a lot more to know, but once you do I think you will enjoy Vray a lot.

Edited May 16, 2012 by CoreyMBeaulieu

[John Dollus]

once you change your tone mapping to something much more reasonable than HSV, you will see a big difference. If you look at the overall range and levels of the original image, you are still pretty far away from that goal.

[Greg Law]

Thanks alot with all your help with this. I will send the next few days trying out all your suggestions then put the result up on the work in progress forum. I feel a lot happier with the way vray is working. I know I have a long way to go but at least I feel I'm starting to head in the right direction.

Edited May 16, 2012 by Greg Law