Corona Renderer Forum

General Category => Gallery => Work in Progress/Tests => Topic started by: white on 2012-11-02, 10:22:54

Title: first corona interior tests
Post by: white on 2012-11-02, 10:22:54
Hello to everyone!

I´m vray user since i started in 3d-visualisation years ago, so i collected a huge library of models and materials - a main reason, why i´ve never worked with other renderers seriously (also unibiased is too slow for my workflow).
Now, it looks like i´ve found a new baby i can play with - the vray-materials converter is damn great and one of the most important tools for me to keep hands on an alternative render to vray if i wanna make really realistic images!
Also the Backgroundimage-material is very helpful and easy to use!
So i´ve tested corona a few days, here you can see my first test-scene...it looked pretty good after 90 minutes. Finally i wanted to stop rendering, when the darker area in the kitchen on the left is clean enough....Resolution is 1600/928...other information you can see in the picture (corona stamp). CPU ist overlocked to 3,8MHz.

All materials are vray-materials converted with corona-converter-tool. Only played a little with opacity of curtains etc...

I´ve done a quick postwork very slightly. Maybe it doens´t look too realistic as i´ve only a cheap monitor...

Render settings are default (except: Precomp Step of HD-cache is "2").

As i´m new to unibiased, i´m not sure if the value "ray/s" (bottom right corner) is an indicator to speed of rendering?

Title: Re: first corona interior tests
Post by: Ludvik Koutny on 2012-11-02, 10:57:21
Try following HDcache settings, as they should make rendering faster in a long run.

Precomp branching: 4
HDCache PT Samples: 512

Direction sensitivity: 3
Position sensitivity: 30
Normal sensitivity: 3

(Rest at default)

Never render final rendering with precomp step larger than 1 ;)

And always make sure glass in your windows has mode set to twosided ;)
Title: Re: first corona interior tests
Post by: DeadClown on 2012-11-02, 11:44:04
Very nice setups! I like the look and feel of your images :)
Since I'm always trying to make the converter better: are there any wishes or suggestions for Vray conversion? MR conversion is pretty much 1:1 already but Vray materials are a bit harder to do ;)
Title: Re: first corona interior tests
Post by: maru on 2012-11-02, 11:46:48
Nice modern interiors. I think something is wrong with lightness-darkness ratio, though. For example in last render I think background should be much brighter, at least for a photorealistic look. But I may be wrong. :)
Title: Re: first corona interior tests
Post by: Ludvik Koutny on 2012-11-02, 11:48:06
Very nice setups! I like the look and feel of your images :)
Since I'm always trying to make the converter better: are there any wishes or suggestions for Vray conversion? MR conversion is pretty much 1:1 already but Vray materials are a bit harder to do ;)

I use Vray regularly at work so i have some knowledge of VrayMTL, but i will need some time to put proper conversion explanation together ;)
Title: Re: first corona interior tests
Post by: andreupuig on 2012-11-02, 12:09:31
Nice work and nice models.

@DeadClown: I noticed that the vraynormal map obviously is not translated, but it bring to crash when trying to render. I suggest to disable the corona bump map slot after the conversion when there's a vraynormal map in the vray bump map slot, with a warning message with the list of which materials have normals assigned. I had a model with lot of objects and the task to find which object was causing problem was a long and tedious work. I suggest this until corona support normals, if the next release of alpha/beta have normals support and soon to be released discard this. Just my experience. Bye!
Title: Re: first corona interior tests
Post by: DeadClown on 2012-11-02, 12:24:25
Rawalanche: That would be awesome :)
andreupuig: oh.. yes, I forgot this one. I added a warning for the max normalBump map but not for the Vray one, I will add it asap ;)
Title: Re: first corona interior tests
Post by: Ondra on 2012-11-02, 15:45:12
I like the pictures exactly because they don't have the sterile photograhic look ;)

Rays/s is the indicator of the crude, brute-force rendering speed. It is higher on better CPUs and in simpler scenes (simple shaders and geometry, only path tracing with no caching), but it does not indicate the rendering speed directly, because some scenes need more rays to converge
Title: Re: first corona interior tests
Post by: white on 2012-11-03, 20:08:55
Here you can see the new image with settings of Rawalanche...i modified the kitchen material a little (no bump, more glossy...a bit too much now, but doesn´t matter for this tests...)

This is a Raw-render, no postwork...

Rendering was much slower at the beginning (~50 minutes), but seems to be faster later on...



@maru: i´ll upload a new image with brighter background for comparison; as the facade is not lit by the sun i thought to make it a bit darker...


@keymaster: thanks for the infos.

.....still testing....:)



Title: Re: first corona interior tests
Post by: Ondra on 2012-11-03, 20:45:17
Looks like you have some raytracing light leaks near the ceiling. Do you have the scene centered out of world origin? You can also probably get rid of them by subdividing the problematic geometry
Title: Re: first corona interior tests
Post by: white on 2012-11-06, 06:39:37
no, keymaster...wasn´t out of origin, i think it was bad modeling....

here´s the almost final image...critics are welcome...
it was an overnight render...

ceiling is still a bit noisy, will try to get rid of it (material setting?!)


Title: Re: first corona interior tests
Post by: Ludvik Koutny on 2012-11-06, 08:01:03
If you are using PT+HD cache and no real glass in windows, then only source of significant noise could be bad curtain material.

You should always watch closely materials of any objects covering light sources, including curtains around windows.

Most common mistake is having opacity-mapped curtains or just some opacity set to them, or having refraction on them without twosided mode set.

Title: Re: first corona interior tests
Post by: Ludvik Koutny on 2012-11-06, 08:07:36
I am attaching an example of proper curtain material :)
Title: Re: first corona interior tests
Post by: Ludvik Koutny on 2012-11-06, 08:12:07
Lastly, your scene is very dark...  i suggest you brighten it up a bit using intensity multiplier value, and then reduce burn around windows by increasing highlight burn value. And maybe try little brighter floor stone...  or some worn out wood floor :)
Title: Re: first corona interior tests
Post by: white on 2012-11-06, 14:48:22
oohhhhh, Rawalanche; much better...used your curtain material, made it a bit more translucenc, also modified glass material...for a two hours rendering in resolution 2500/1450 its really clean, i think....

brightened up image with intesity value as i wanted to keep a dark floor...
Title: Re: first corona interior tests
Post by: Ludvik Koutny on 2012-11-06, 15:26:35
maybe less reflective floor with lower glossines, or try to put wood texture also in reflection glossiness slot to get some variance (you will have to tweak RGB level and RGB offset of the texture to get right amount of glossiness) :)
Title: Re: first corona interior tests
Post by: Chakib on 2012-11-06, 16:01:58
Nice i like it a lot now, really great improvement, bravo !
Title: Re: first corona interior tests
Post by: maru on 2012-11-06, 16:22:56
Looks much better now! But floor looks wet. :)
Title: Re: first corona interior tests
Post by: white on 2012-11-06, 20:25:03
thanks for the helpful comments...as a vray-user (a little tired of making thousands of adjustements to get a good lightened image) i´m really satisfied with speed...
still learning material settings...glossy effects etc....

i think i´m going to the next test-project...hmmm...i should´nt forget to have a life outside of corona...:)


Title: Re: first corona interior tests
Post by: maru on 2012-11-06, 20:38:13
i should´nt forget to have a life outside of corona...:)

Blasphemy!
Title: Re: first corona interior tests
Post by: Chakib on 2012-11-07, 16:20:34
thanks for the helpful comments...as a vray-user (a little tired of making thousands of adjustements to get a good lightened image) i´m really satisfied with speed...
still learning material settings...glossy effects etc....

i think i´m going to the next test-project...hmmm...i should´nt forget to have a life outside of corona...:)

Really nice , you should add a little bit of bloom effect in windows and some light in the kitchen.
Title: Re: first corona interior tests
Post by: lacilaci on 2012-11-07, 20:33:31
Nice!