Indigo Renderer Forum

Posted: **Wed Mar 19, 2008 6:07 pm**

http://www.indigorenderer.com/joomla/in ... &Itemid=62

Changelog:
1.0.8
* Improved energy conservation for Phong material
* Increased max albedo for phong and diffuse from 0.9 to 1.0
* added Oren Nayar material
* staticly linking with OpenEXR
* OpenEXR support enabled for windows 64-bit build
* added specular_reflectivity_spectrum option for the Phong material.

The specular reflectivity spectrum for Phong materials defines the specular reflectivity at normal incidence.
If this element is present, then diffuse will be set to zero.
The specular reflectivity spectrum can be used to create metal materials without using n-k data.

Use the specular reflectivity spectrum like this:

Code: Select all

<material>
		<name>spheremat</name>

		<phong>
			<diffuse>0.0 0.0 0.0</diffuse>
			<exponent>300</exponent>

			<specular_reflectivity_spectrum>
				<rgb>
					<rgb>0.6 0.6 0.6</rgb>
					<gamma>1</gamma>
				</rgb>
			</specular_reflectivity_spectrum>
		</phong>
	</material>

The Oren-Nayar BRDF models very rough surfaces, such as clay, the moon, sprayed concrete etc... It differs from a Lambertian BRDF in that it has more back-scattering.
The sigma parameter is a roughness parameter that controls the amount of back-scattering.

Oren nayar material:

Code: Select all

<material>
		<name>3</name>
		<oren_nayar>
			<albedo_spectrum>
				<uniform>
					<value>0.7</value>
				</uniform>
			</albedo_spectrum>

			<sigma>0.2</sigma>
		</oren_nayar>
	</material>

Posted: **Wed Mar 19, 2008 6:14 pm**

hmmm ok so 1.0 stable waits a bit longer

more buttons..more wiki

Posted: **Wed Mar 19, 2008 6:15 pm**

Haha, yup, little bit longer for 1.0 stable, I decided to improve the Phong model first.
And then I threw in the Oren-Nayar

Posted: **Wed Mar 19, 2008 6:21 pm**

you just cant help yourself can you

Posted: **Wed Mar 19, 2008 6:21 pm**

nope

Posted: **Wed Mar 19, 2008 6:25 pm**

Damn. And you're posting this as I'm taking my break! So many goodies I'm dying to try out here. The new materials look FANTASTIC!

Posted: **Wed Mar 19, 2008 6:26 pm**

Heh.. sorry BbB

Posted: **Wed Mar 19, 2008 6:56 pm**

Thx Ono, exr works fine and the new material looks great

Posted: **Wed Mar 19, 2008 8:29 pm**

Wow, I hadn't thought see 1.0.8 so soon

Thanks a lot for your work Ono!!

* OpenEXR support enabled for windows 64-bit build

Does this mean that we can expect regularly also testversions in 64bit?!

Posted: **Wed Mar 19, 2008 8:34 pm**

WOW tnx ONO
Luca.

Posted: **Wed Mar 19, 2008 8:44 pm**

Great!!!!!!!!!! tnx ONO

Posted: **Wed Mar 19, 2008 9:19 pm**

in oren nayar where is the colour from? says uniform...

Posted: **Wed Mar 19, 2008 9:56 pm**

wow ono! that looks sweet! especially the blue sphere! i love it x3

greetz Seb

Posted: **Wed Mar 19, 2008 10:20 pm**

thanks a lot, Ono!! very interesting news!

ciao!

Posted: **Wed Mar 19, 2008 11:01 pm**

Thanks Ono... astonishing as always.

Indigo Renderer Forum

Indigo 1.0.8

Indigo 1.0.8