Cindigo: A few material and sun light questions

Alain · Post by **Alain** » Mon Aug 27, 2007 10:54 pm

Q1:
I try to let the sun come in trough the windows, the result you see in picture "no_shadow_if_glassmaterial_and_glassgeometry_on.png" but thats not what I want.

I want to let the sun come in an making those hard shadows like you can see in the picture "shadows_if_no_glassmaterial_and_no_glassgeometry.png".
But without removing the glassmaterial and glassgeometry !
And yes, the glass has a thickness

Q2:
I want to get a light blurry reflection on the floor material and some little bump. But I have no idea which parameters I have to change (the documentation has not enough information for me).

I also want to get a reflection on the glass material, which parameter is for reflection ?

Q3:
One more thing that I don't understand:
The angle of the sunlight in cinema is not the same as it is in indigo (compare "Shadows_in_Cinema.png" and "Other_shadow_angle.png").

So I hope didn't confuse you as more as I am already

Regards
Alain

Sebastian · Post by **Sebastian** » Mon Aug 27, 2007 11:01 pm

Have you already tried to render the Scene WITHOUT Bidirectional Ray-Tracing ??

Turn Bidir off and try again ^^

Alain · Post by **Alain** » Mon Aug 27, 2007 11:09 pm

You mean to set "bidirectional" "false" in the inifile.txt file ?
Yes I did, makes no difference...

CoolColJ · Post by **CoolColJ** » Mon Aug 27, 2007 11:23 pm

you using MLT?

Alain · Post by **Alain** » Mon Aug 27, 2007 11:48 pm

I'm not sure.
I just saw that I can activate "export settings to xml" in the advanced register of the indigo render settings tag (i'm not sure if "export settings to xml" is set to false then indigo looks for the values in "inifile.txt" ??).
it was not activated before.
I can choose there render mode "MLT with BiDir" or "MLT Mode" or "Pathtracing with or without BiDir".

I just tried with "MLT Mode" and "pathtrace with BiDir" but it doesnt change at all. It just takes much more longer to render !

Marcofly · Post by **Marcofly** » Mon Aug 27, 2007 11:56 pm

have you seen my attached .rar file on the cindigo thread?

CoolColJ · Post by **CoolColJ** » Tue Aug 28, 2007 12:10 am

I'm testing the scene now Alain

interesting about the renessance.jpg bump map image it wanted..... must be some bug

damn a lot of objects. also your scene is too big! The autofocus was set at 420037.53196m according to the log file..... need to scale your scene down with the Cindigo cale settings upon export to be accurate, anyway I have hard shadows now..will post a pic soon

I used Bidirectional MLT

also the RGB absorbtion values in Cindigo of white RGB are too low to be of much use, since it doesn't have a scaling parameter unlike other exporters in other programs. Use the uniform parameter instead. RGB white = a value of 1

Alain · Post by **Alain** » Tue Aug 28, 2007 12:13 am

@marcfly
thank you!
I use Cinema 9.6, can't open your file, did you save it in a higher version ?

CoolColJ · Post by **CoolColJ** » Tue Aug 28, 2007 12:20 am

Glass with hard shadows no problem for MLT Bidirectional

Alain · Post by **Alain** » Tue Aug 28, 2007 12:22 am

@CoolColJ
wow looks interesting ! thanks you !
And how did you add that blurry reflection on the floor ?

Marcofly · Post by **Marcofly** » Tue Aug 28, 2007 12:23 am

yes, version 10..

CoolColJ · Post by **CoolColJ** » Tue Aug 28, 2007 12:23 am

to get blurry reflections on floor, use Phong material with IOR of 1.2 and exponent of 500 (higher = sharper reflections)

IOR of water is 1.33, glass is around 1.5

Exponent of 0 is like diffuse, 500 is blurry, 1000 is sharper, but you can go up to 100000 or higher

Alain · Post by **Alain** » Tue Aug 28, 2007 12:29 am

@marcofly
how about a screenshot of the settings ...

?

CoolColJ · Post by **CoolColJ** » Tue Aug 28, 2007 12:42 am

and for bump map on the floor. Have a bump in the C4D bump map channel for the floor as you already have, and then set the Bump size the Phong material to like 0.001, for a very slight bump, 0.01 a bit more etc

render after some more time, over 500+ samples now, you can see the details and reflections better now

and my settings. Max bounces set to 100 will render faster, 1000 will look better

make sure to select - save to IGI, so you can tone map the image later on with Violet or resume the render any time you want to with the Indigo Resumer program

Alain · Post by **Alain** » Tue Aug 28, 2007 12:43 am

CoolColJ wrote:damn a lot of objects. also your scene is too big! The autofocus was set at 420037.53196m according to the log file..... need to scale your scene down with the Cindigo cale settings upon export to be accurate, anyway I have hard shadows now..will post a pic soon

where are those scale settings in cindigo ? and how mutch I have to scale down the hole scene ?

Cindigo: A few material and sun light questions

Cindigo: A few material and sun light questions

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