Chaos Corona Forum

General Category => Gallery => Topic started by: diagonalhatch on 2014-01-10, 22:50:27

Title: Porcelain Render + Compared to Vray one
Post by: diagonalhatch on 2014-01-10, 22:50:27

Hey,
Here is quick render of my old scene, did it again in vray and converted to corona. Same light setup, turned vray DoF off cause it wanted to render for 30-40minutes...
I've let Corona run for 20 mins.
Any suggestion how to get rid of dark glass shadow? There is a corona rectangle light above set to enhance shadows. Move the light away, make it bigger?

Title: Re: Porcelain Render + Compared to Vray one
Post by: Ludvik Koutny on 2014-01-10, 23:00:17

In your Vray scene, do you have affect shadows checkbox on your glass material enabled?

Title: Re: Porcelain Render + Compared to Vray one
Post by: diagonalhatch on 2014-01-10, 23:24:37

Nope, I didnt have it ticked. Now I do, but still no luck. Even after making glass less transparent.
In corona I've made light source bigger but still get that dark shadow.

Title: Re: Porcelain Render + Compared to Vray one
Post by: diagonalhatch on 2014-01-11, 01:22:25

Anyway here is the final result. I think I'm going to switch to Corona...

Title: Re: Porcelain Render + Compared to Vray one
Post by: Stan_But on 2014-01-11, 02:53:04

Good idea.)
In v-ray you need to set max depth refl/refr in material more than 5. Better would 25 bounce - like in corona.
Also don't limit max depth in render setup or set it 25 too.

Title: Re: Porcelain Render + Compared to Vray one
Post by: Javadevil on 2014-01-11, 05:01:41

Looks great, just fix those faces on the bottom of the wine glasses.

Title: Re: Porcelain Render + Compared to Vray one
Post by: Ludvik Koutny on 2014-01-11, 11:34:22

The point is that shadows in corona are dark because it generates caustics, which is then clamped so it does not produce fireflies. Just switch refraction mode to hybrid, and you will get brigther shadows ;)

Title: Re: Porcelain Render + Compared to Vray one
Post by: diagonalhatch on 2014-01-12, 00:04:12

>headoff - Thanks for advice, that helps a bit with glass material.
>Javadevil - Tried to do some fixing, but maybe I would need to use some nicer hdri map also.
>Raw - Many thanks for explanation, switching to hybrid was the trick for this one. I guess reading what I have in material options wouldnt hurt :)
Thanks for the comments, here is one with hybrid glass.

Title: Re: Porcelain Render + Compared to Vray one
Post by: Stan_But on 2014-01-12, 02:33:25

You welcome!)
And forgot one also - set cutoff spinner in glass materials to "0.0" - it is cutting some refl/refr too.