stills from animation...need help

[chow choppe]

Hi all

 

i am Doing animation with vray for the first time

her are some frames from the animation

 

 

 

 

 

I want to know a few things

 

1.) My render time are coming veryhigh. I am using a quadocre with 4 GB ram. render size is 720 X 576 and each frame is coming out to be 8 mins. Is this frame time good for my machin or i need to tweak my settings.Buti am not rendering at very high setiings. Using -3 -3 for Irradiance map, HSph div 50 , Inter samples 20 and lightcache 1000 subdicivsions and smple size 0.02mm. I feel the render time is coming way too high as i dont have too much details in this image. Lightcache for glossy rays is on .

 

2.) I want to know the use of Lightcache for gloosy rays on. it reduces my render time but then glossiness is not so good. i was going thru Brians vray Modules where he mentioned that secondary bounces shud be made none in order to use Lightcache for glossy rays. I have been able to understand the purpose of using Lightcache for glossy rays and how can i increase the quality by reducing render time at the same time.

 

3.)I shud be using area filter for final images ryt?

 

4.) please give me comments on how can i increase the rendering quality and also avoding flickering at the same time.

 

5.) right now i also see a lot of noise inthe image. how can i reduce it without adding to render time much

 

thanks

[kippu]

1) yes render times are high , but i wonder what are values of the materials and whats the point of having both max and minimum values at -3,-3 ...thats confusing ...

 

2) theres no magic of reducing rendering time without decreasing quality ...there are minor tweaks ...but you have to do the renderings with different variables and see what works for you

 

3) again that is down to personal choice ..area is smoother and some flickering goes away with a slight increase in time

 

4)flickering , depends on light settings + vray settings and your materials

 

5) see point 4 again

[shaneis]

To save some time, you could bake the IES lighting. Smoothing the normals on your chairs might help the overall look as well. The chairs are very shiny, are they meant to look like that?

[chow choppe]

1) yes render times are high , but i wonder what are values of the materials and whats the point of having both max and minimum values at -3,-3 ...thats confusing ...

 

2) theres no magic of reducing rendering time without decreasing quality ...there are minor tweaks ...but you have to do the renderings with different variables and see what works for you

 

3) again that is down to personal choice ..area is smoother and some flickering goes away with a slight increase in time

 

4)flickering , depends on light settings + vray settings and your materials

 

5) see point 4 again

 

1.)materials are very basic , with glossiness values and subdivisions at default of 8. I used -3 , -3 because this setting i use for stills as fast rendering. higher setting will take more time to render

 

2.) I just want to know what variables shud i be looking at? What minor tweaks are u talking about? that is what i want to understand

 

3.)okay

 

4.)ryt now i am not able to arrive at values for good settings

5.)same as above

 

u havent answered to one point "lightcache for glossy rays and how it shud be put to best use?

 

Thanks

[chow choppe]

To save some time, you could bake the IES lighting. Smoothing the normals on your chairs might help the overall look as well. The chairs are very shiny, are they meant to look like that?

 

 

Hi shaneis

 

How do u do that? and smoothing normals? i havent understood this. No chairs are not meant to be that shiny but glossiness was assing to the render time so i avoided it in chairs

 

Thanks

[STRAT]

there's nothing wrong with -3-3. not confusing at all. quite low though.

 

Also, have you considered pre-caching both your primary and secondary bouncing at half size?

[shaneis]

Smoothing normals - I mean you could soften the internal edges on your chairs,(see picture below) they will look smoother, but without adding extra polys. In max, it's probably something like a smooth modifier.

 

You can "fake" glossy highlights to an extent with the A&D material - either by using "Interpolate Reflections" or "Highlight Only". If they are still too expensive for render times,it would look better with a mat material rather than an highly glossy material.

 

Baking lights - I'm not sure how you would do it in V-Ray, I use Maya. Here's a link that might help you though...

 

http://www.evermotion.org/tutorials/rendering/bake3d/

 

Otherwise, post a query in the V-Ray section here.

[SandmanNinja]

I think the advantage to using the same min and max values is so the antialias is the same throughout.

 

Not sure - been a while since I mucked with vray

[STRAT]

nope. your talking about AA min and max. IrrMap min and max determin the number and qulity of prepassing.

[chow choppe]

Thanks all for the replies

I thought i am making some usual errors as this is my first animation but i am hearing about new terms like baking 3d, A & D materials etc

 

Are my Irradiance and LC settings fine first of all?

 

How does lightcache for glossy rays help? with that i get poor glossy reflections. how can i improve the quality?

 

I saw somewhere on CGA a list of things to be kept in mind while doing animation with vray. Not able to find it though

 

Things like:

1.) Use a little bump along with reflections gives effect of glossy reflections and is faster than actual glossy reflections.

2.) How to fake reflections by using maps etc

 

I am stuck with this as i dont know vray in depth so i am not able to understand my which setting is wrong

 

Thanks all