outside / inside WIP

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Phil
Posts: 154
Joined: Mon Nov 06, 2006 2:22 am
Location: St. Wendel, Germany

outside / inside WIP

Post by Phil » Sun Nov 19, 2006 4:54 am

Hello,

this is my first outside inside test:

The ouside version:
Image
The inside version:
Image

PLease observe the shadow and the bright regions behind the glass on the floor!

In the inside version, everything which is outside is in the shadow.
In the outside version, everything which is inside is in the shadow.

I really do not understand such a big difference.

The position of the sun is the same, only the camera position changed between the two versions.

I suppose that I make somtething wrong with the glass, here is the code:

Code: Select all

<material>
		<name>verre</name>
		<specular>
			<normal_reflectance>0.203</normal_reflectance>
			<ior>1.149</ior>
			<transparent>true</transparent>
			<cauchy_b_coeff>0.000</cauchy_b_coeff>
			<rgb_absorptivity>0.040 0.040 0.040</rgb_absorptivity>
		</specular>
</material>
Does anyone have some tips?

Regards, Phil

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ThatDude33
Posts: 216
Joined: Wed Jul 05, 2006 1:26 pm
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Re: outside / inside WIP

Post by ThatDude33 » Sun Nov 19, 2006 5:11 am

Phil wrote: In the inside version, everything which is outside is in the shadow.
In the outside version, everything which is inside is in the shadow.

I really do not understand such a big difference.

The position of the sun is the same, only the camera position changed between the two versions.

I suppose that I make somtething wrong with the glass, here is the code:

Code: Select all

<material>
		<name>verre</name>
		<specular>
			<normal_reflectance>0.203</normal_reflectance>
			<ior>1.149</ior>
			<transparent>true</transparent>
			<cauchy_b_coeff>0.000</cauchy_b_coeff>
			<rgb_absorptivity>0.040 0.040 0.040</rgb_absorptivity>
		</specular>
</material>
Does anyone have some tips?
Well, phil, from looking at the glass code, there are two things that are wrong with it.

first: there is the ior. glass has IOR of 1.512
second: the <rgb_absorptivity> value is very high. That would explain why the other areas are in shadow: the light is absorbed in the glass. For true glass, try values of 0 0 0 ;)

hope that helped,
Matt
Matt B. >>Maya To Indigo<<
Image

Phil
Posts: 154
Joined: Mon Nov 06, 2006 2:22 am
Location: St. Wendel, Germany

Post by Phil » Sun Nov 19, 2006 6:24 am

Thanks Matt,

this helps me to understand, but this did not helped to achieve better results :cry:
I will try some different parameters, I will also test with normal_reflectance, and I will post some results later or tomorrow here.

Regards, Phil

Phil
Posts: 154
Joined: Mon Nov 06, 2006 2:22 am
Location: St. Wendel, Germany

Post by Phil » Sun Nov 19, 2006 7:05 am

Hi,

just to better explain what we should see:

In this test, I remove the vertical glasses.
(there are also new discovered problems on the glasses lying on the roof)

Image

Regards, Phil

Phil
Posts: 154
Joined: Mon Nov 06, 2006 2:22 am
Location: St. Wendel, Germany

Post by Phil » Sun Nov 19, 2006 9:33 pm

Hi,
disabling bidirectional solved the problem of the shadow. :?

Phil
Posts: 154
Joined: Mon Nov 06, 2006 2:22 am
Location: St. Wendel, Germany

Post by Phil » Mon Nov 20, 2006 2:31 am

Finally, I have a first decent result:

Image

What dio you think about it?

Regards, Phil

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OnoSendai
Developer
Posts: 6244
Joined: Sat May 20, 2006 6:16 pm
Location: Wellington, NZ
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Post by OnoSendai » Mon Nov 20, 2006 2:33 am

oooh nice...
Yes, bidir still has some issues :(

Phil
Posts: 154
Joined: Mon Nov 06, 2006 2:22 am
Location: St. Wendel, Germany

Post by Phil » Mon Nov 20, 2006 10:16 am

oooh thanks...

And thanks a lot for this super software. :!:
I come from the P.O.V world, and what I can say say about indigo is...
This changed my lyfe (rendering life :lol: )

Thanks, best regards

Phil

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