kitchen shot

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Maximus
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Re: kitchen shot

Post by Maximus » 04 Mar 2012, 20:46

Kzin wrote:
Maximus wrote:
Kzin wrote: for scenes with alot of lights i would suggest david's post on elementalray regarding the light treshold. the physical light can be found under the mental ray lights shader in the rendertree.

and perhaps post your renderings in the mi forum with a list of your problems.
I'm sorry, i was tryin to use the physical_light shader but i cant make it to work, i was reading the help
http://download.autodesk.com/global/doc ... d28e711800 but it doesnt say how to connect nodes.

How i should connect it into render tree? cause i tried physical_light output ->soft light every port and nothing happened. Tried to plug it directly to the Light node, nothing happened. Playing with parameters on every input port, nothing happened.

I never used this shader, so i'm curious how to make it work.

Thanks again for usefull tips

Max
i use this shadersetup, it works really good.

Image

Many thanks again Kzin, have any idea why when i turn on "area light" it stops working? Apparently can use this setup only if its not an area light source? What if i need soft shadows?

Thanks again,
Max

Kzin
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Re: kitchen shot

Post by Kzin » 04 Mar 2012, 21:19

strange, area lights are working here. have you used the same values for the physlightshader?

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Maximus
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Re: kitchen shot

Post by Maximus » 05 Mar 2012, 05:46

Kzin wrote:strange, area lights are working here. have you used the same values for the physlightshader?
i used the same setup as you showed me. Blackbody->physical light -> light.
If in the last node named "light" the orange one, i turn on the "area light" on, it doesnt work anymore, i just double checked, doesnt work if the shape is seet as rectangle and disk. Works only with sphere and cylinder for some weird reason.

Kzin
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Re: kitchen shot

Post by Kzin » 05 Mar 2012, 09:31

Maximus wrote:
Kzin wrote:strange, area lights are working here. have you used the same values for the physlightshader?
i used the same setup as you showed me. Blackbody->physical light -> light.
If in the last node named "light" the orange one, i turn on the "area light" on, it doesnt work anymore, i just double checked, doesnt work if the shape is seet as rectangle and disk. Works only with sphere and cylinder for some weird reason.
mmh, i am using rectangle shapes most time.
have you tryed a new, clean scene?
which version of si do you use?

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Maximus
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Re: kitchen shot

Post by Maximus » 05 Mar 2012, 09:40

tested on a new fresh scene, using soft 2012 x64bit SAP. Its not working unless i use sphere or cylinder. Yay more bugs

Kzin
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Re: kitchen shot

Post by Kzin » 05 Mar 2012, 10:02

Maximus wrote:tested on a new fresh scene, using soft 2012 x64bit SAP. Its not working unless i use sphere or cylinder. Yay more bugs
disc, object and rectangle area lights with physlight and blackbody.
Image
this is si2012 sap, but i tested this also with si2012 and it works.
could you send me your clean testscene, so i can take a look?

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Maximus
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Re: kitchen shot

Post by Maximus » 05 Mar 2012, 10:16

here it is
Attachments
Scene.rar
(90.35 KiB) Downloaded 59 times

SreckoM
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Re: kitchen shot

Post by SreckoM » 05 Mar 2012, 10:23

It works here too, I use point light, maybe that makes difference?
- H -

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Maximus
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Re: kitchen shot

Post by Maximus » 05 Mar 2012, 10:25

switchin to point make it works but it gives a total weird output, like if the light is coming reversed, from the opposie side of the light itself..

Kzin
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Re: kitchen shot

Post by Kzin » 05 Mar 2012, 10:25

Maximus wrote:here it is
ah, ok, now i see.
you used a spotlight, that does not work. its the same like in vray, spotlights does not exist in real world as a lightsource. use pointlights for this and it should work.

Kzin
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Re: kitchen shot

Post by Kzin » 05 Mar 2012, 10:26

Maximus wrote:switchin to point make it works but it gives a total weird output, like if the light is coming reversed, from the opposie side of the light itself..
also use a cone value of 0.5 for example.

edit: also, you have to look on the z direction of the light, thats the light direction.
Last edited by Kzin on 05 Mar 2012, 10:29, edited 1 time in total.

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Maximus
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Re: kitchen shot

Post by Maximus » 05 Mar 2012, 10:29

alright thanks for clarifing, now it works :)
Gotcha

SreckoM
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Re: kitchen shot

Post by SreckoM » 05 Mar 2012, 10:30

Ahh Mental Ray :D
- H -

Kzin
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Re: kitchen shot

Post by Kzin » 05 Mar 2012, 10:41

the whole physical stuff needs to be implemented as presets and documented with some examplescenes so the users know that it exist and know how to use it, but yes, thats mr (integration).

SreckoM
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Re: kitchen shot

Post by SreckoM » 05 Mar 2012, 10:52

Yeah I hear you.
But I think that we are beating a dead horse here ....
- H -

SreckoM
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Re: kitchen shot

Post by SreckoM » 05 Mar 2012, 10:56

@Kzin question for you, what is your opinion on buying MR standalone to be used with SI? It there any meaningful workaround that one can use? Will that give more freedom to user?
- H -

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