Fine tune a render

[sledgehammer1]

Hi Everyone,

 

I have been dedicating the last weeks to dive in to the world of rendering in vray smax. Haven't really had the time before but finaly I do.

 

I am trying to visualise this school project of mine and am working on a render of a really big modell. I imported from Rhino to smax and its really havey. I a mturning layers off while I'm working but its still really slow, and not to talk about the vray frame buffer. Any Ideas of how to make things easier.

 

Well to the real question take a look at my first render, I will apply a lot of trees and Ivy and more materials but the file is getting so havey so I'll just try to make all the render setups now before.

 

 

I am using: Daylight system with vray sune and no skylight. (Is this optimal for outdoorsy realistic light?) I have GI on and 1. Irradiance mapping and 2. light cache.

 

Adaptive DMC Min sub 2, max sub 6. (will push this for final render)

 

Color mapping: Linear Multiply

 

What troubles me are the dots appearing in the windows. Is there any easy way to get ridd of them or do I just need to push my render settings?

Also the shadowy parts are getting so dark, how do I do to get more light there without using another light source?

 

Second, I think it would be awesome if I got some particles/foggy stuff in the litt areas. Is Vray environment fog the best sulution for that?

 

Thanks in advance!

Best regards

Sledgy

[John Dollus]

The dots are a factor of your irradiance map undersampling. If you double your HSph subdiv and interp samples, you should see a shift in their appearance.

What are your camera exposure settings?

Give that a shot and repost.

[sledgehammer1]

Hi,

 

thanks for answering. Among all my querries teh dots inside is the main one.

 

I pushed both HSph subdiv and interp samples to 200 from lite 70/20.

 

There were some differance but far from satisfying:

 

Got other ideas?

 

once again thanks,

Best regards

[sledgehammer1]

Ooo.. Camera settings:

 

Focallength: 27 mm

F-number:5

Shutterspeed: 350

ISO:100

[Corey Beaulieu]

Your shadows are dark because, if I understand correctly, you turned on GI, but have not given any ambient light that would cast GI. You need a skylight of some kind. I would start by just putting a Vray sky map into the "Environment Override" and then maybe look to change it into an HDRI setup later (start with the basics and get more complex later).

 

The DMC sampler is actually already high. Not crazy, but on my highest settings I only ever use 2/8 so that is fine. 1/4 will speed up you test times.

 

John is right about the Irr Map. Try putting your settings on medium and the 50 HSph and 25 Interp. A rule of thumb for getting started would be that you should interpolate at a number that is half of the sampling and that 50 is a decently low starting point. You could also just simply have checked on "show samples" which you will want to keep off. "Show Calc Phase" is what you want to if you are trying to view as it renders.

 

Lastly, Vray Fog is nice. Regular Fog is nice. Using a VrayZDepth pass is a nice way to haze out the background without adding a fog. The later is what I prefer for stills, but to each their own. Fog though, i would render separately so that you have a good, clean render that you can work with and add or subtract fog as you like.

[Corey Beaulieu]

I would add that you also want to set the rest of your color mapping to include a gamma of 2.2 and probable tick the "affect background" because your sky looks dark. It could also just be that you need to increase the output value of your sky map.

 

Truthfully though, I would not render the sky in. Use a sky map, dome light, or HDRI for GI, render your background black, and be sure to save and alpha so that you can add a sky in post.

 

Your camera settings don't seem right for outdoor daytime. An F of 5 should be extremely bright. try F11 or F16 with 100/100 on your ISO and Shutter Speed. be sure to tick on exposure and tick off the Vignette.

[sledgehammer1]

BIG THANKS! I'll get back tomorrow with hopfully splendid results! Once agin thanks!

[salvador]

Turn off "show samples" in the IRRMap paremeters and that will turn off your dots.

[Corey Beaulieu]

Turn off "show samples" in the IRRMap paremeters and that will turn off your dots.

 

Way to go reading the other posts!

[Nic H]

you cant really use rhino models in max

they are really heavy and messy

you need to remodel them for good results

[Corey Beaulieu]

you cant really use rhino models in max

they are really heavy and messy

you need to remodel them for good results

 

I disagree. Rhino Models can definitely be heavier, but the heaviness is not relative to the results on the render end. Most basic forms come into Max without issue and the ones that don't can be addressed before export. selecting curved and spherical shapes in Rhino and typing "Mesh" allows you to add a more Max-like subdiv to your elements. You don't always need to rebuild in Max.

 

That said, Rhino has a Vray plug-in and Max is a strong modeller so there isn't really a need for this workflow.

[sledgehammer1]

Alright thanks for answers. Well my exprience from vray-rhino is that it is far from as comprehensive as the max vray. Please correct me if I'm wrong but thats what I've thought.

 

Also rhino is just 32-bit so far and gets really slow when models grow therefore I thought I would earn some speed on going to 64bit max, that's however a point that i've seriously doubt from now on. Still though there is a lot I miss in the vray rhino.