Clorophyl test, need help plz

[Kram1032]

yes, I know...

Edit:
* * Can you post the .xml? How many pps? * *

* * = joke

[mrCarnivore]

First of all the material need a higher exponent. (what about 1000-3000)

The SSS-values should be much higher, too. (bias 50-150)

Also I would reduce the amout of red scatter. You can always increase it again afterwards.

Hope these tips help.

[Kram1032]

reducing the amount of red scratter... hmmm.... And I thought, it's too blueish, xD, thanks anyway!

[mrCarnivore]

If it's too blueish you should reduce blue and not increase red.

Red is not the complementary color to blue!

[Kram1032]

Yes, I know, cyan is the complimentary, but Í thought, red should be fine...
But I'll try anyway

[mrCarnivore]

That's the same reasoning as when somebody adds sugar to compensate for a too salty meal.

The complementary colour to red is cyan and to blue is yellow... To compensate for a too blue sss eigther use less blue or more red AND green!

[Kram1032]

Yes I know xD
Just stop with it, we both know it
As I said, I'll try it, in ~20 min, I'll start with it!

[mrCarnivore]

What do you need 20 mins for? Need to buy some sugar for your salty meal?

Ok, I will stop now! Promise...

Can't wait to see your results. I'm an sss-newbie myself...

[Kram1032]

I needed 20 minutes, 'cause my father told me to emty house-internal dustbins and load the externals Then, I had to restart the system for some reason, but now, I'm rendering (5min 55sek was last img.update )

[Kram1032]

This is my new Material-try...

Code: Select all

<medium>
		<name>Clorophyl.002</name>
		<precedence>20</precedence>
		<basic>
			<ior>1.5</ior>
			<cauchy_b_coeff>0</cauchy_b_coeff>
			<absorption_coefficient_spectrum>
				<rgb>
					<rgb>1 0 1</rgb>
				</rgb>
			</absorption_coefficient_spectrum>
			<subsurface_scattering>
				<scattering_coefficient_spectrum>
					<rgb>
						<rgb>5 7.5 0</rgb>
					</rgb>
				</scattering_coefficient_spectrum>
				<phase_function>
					<uniform/>
				</phase_function>
			</subsurface_scattering>
		</basic>
	</medium>
	<material>
		<name>Clorophyl.002</name>
		<glossy_transparent>
			<exponent>500</exponent>
			<internal_medium_name>Clorophyl.002</internal_medium_name>
		</glossy_transparent>
	</material>
	<medium>
		<name>Clorophyl.001</name>
		<precedence>20</precedence>
		<basic>
			<ior>1.5</ior>
			<cauchy_b_coeff>0</cauchy_b_coeff>
			<absorption_coefficient_spectrum>
				<rgb>
					<rgb>1 0 1</rgb>
				</rgb>
			</absorption_coefficient_spectrum>
			<subsurface_scattering>
				<scattering_coefficient_spectrum>
					<rgb>
						<rgb>0 11.25 7.5</rgb>
					</rgb>
				</scattering_coefficient_spectrum>
				<phase_function>
					<uniform/>
				</phase_function>
			</subsurface_scattering>
		</basic>
	</medium>
	<material>
		<name>Clorophyl.001</name>
		<glossy_transparent>
			<exponent>10000</exponent>
			<internal_medium_name>Clorophyl.001</internal_medium_name>
		</glossy_transparent>
	</material>
	<material>
		<name>Clorophyl</name>
		<blend>
			<a_name>Clorophyl.001</a_name>
			<b_name>Clorophyl.002</b_name>
			<blend_factor>0.5</blend_factor>
		</blend>
	</material>

The new image will be added soon, after some more clear up

[Kram1032]

How is it?
After~1h 20 and~500 spp:

[CTZn]

Try lower exponent for the glossy, and use a lower ior (1.1 maybe). speculars are still too sharp IMO.

[mrCarnivore]

Using a little less absorbtion and WAY more sss is the only thing I can think of now...

[Kram1032]

First of all the material need a higher exponent. (what about 1000-3000)

Try lower exponent for the glossy, and use a lower ior (1.1 maybe). speculars are still too sharp IMO.

lol?
Ok, I know, I used far too high exponent, this time...

A "way" more SSS -> more gain or more colour?

I didn't really find out, what gain does to the absorbtion... is it kinda a multiplier for the absorbtion values, or does it effect in a different way?

I'll lower the IOR and get the exponent to 500 and 1000... (so, one remains the same )

Just waiting for the look...

But I actually *think*, that the IOR is quite ok... should be IOR of 1.4 instead, as it's just like skin: water + dirt with a bit higher IOR... -> ~1.4
I'm pretty sure, that the IOR shouldn't be lower than water...

[mrCarnivore]

As far as I understand it, the gain is a multiplier for each colour value. So it is no difference which one you modify.

Sombody correct me if that's wrong pls.

So try to increase the sss so that the highest colour value of sss is about 200.