Re: sky shader and clouds

[Pete Edmunds <pete(at)eclipsecreative.co.uk>]

You can also use a similar workflow to modulate the intensity of the sun and sun glow (after enabling the relevant 'texturable' parameters in the spdl) meaning that the sun appears to dim or vanish as it passes behind the clouds.

could you go into more detail as to what needs to be edited? and setup? that would be great!


Thomas Bryant wrote:

You need to plug the texture file directly into an environment node. You'll need to multiply the output of this using a 'Scalar Basic' node (by a factor of about 5 to 10 - ish), then plug the output of this into the 'Haze' parameter.
 
You can also use a similar workflow to modulate the intensity of the sun and sun glow (after enabling the relevant 'texturable' parameters in the spdl) meaning that the sun appears to dim or vanish as it passes behind the clouds.
 
 
Tom B

---

From: pingo(at)pingofilm.dk
Subject: Re: sky shader and clouds
Date: Fri, 2 Mar 2007 11:00:31 +0100
To: XSI(at)Softimage.COM

I am very interesting in getting this to work... I've reached the same level as Adrian...

cheers

pingo

On 02/03/2007, at 7.49, Adrian Lopez wrote:

Think you could post a grab of your rendertree with this working, Daniel?  Would help alot.

Adrian

On 3/2/07, Adrian Lopez < liquidlightdigital(at)gmail.com> wrote:

Okay, I'm in the rendertree.. I can connect a texture to the haze parameter, xsi inserts a color to vector node inbetween.  I cannot apply spherical mapping or anything, and the rendered image doesnt seem to change.

I know I'm missing something simple.. but what?

On 3/1/07, Daniel Bachmann < xsi.dbachmann(at)gmail.com > wrote:

adrian,

open your rendertree and then add a texture to the haze.

it will work from there only. you cannot attach the texture in the ppg.

 

just ask back if it does not work,

daniel

 

2007/3/2, Adrian Lopez <liquidlightdigital(at)gmail.com>:

Thanks, Daniel..  I made the change to the spdl (after making a backup) and saved it back out.  But I dont see how it made Haze texturable.  Do I have it right?

    Parameter "haze" input
    {
        GUID = "{A057D5D1-B526-486F-A749-F83EBA55CFD3}";
        Type = scalar;
        Value = 0.0;
        Texturable = on;
    }

When I initialize the skyshader from the Pass->Edit menu..   the dialog looks the same.

On 3/1/07, Daniel Bachmann <xsi.dbachmann(at)gmail.com > wrote:

hi adrian,

you can find the spdl here:

C:\Softimage\XSI_6.0\Application\phenolib\spdl\mibase\mia_physicalsky.spdl

 

have fun,

daniel

 

2007/3/1, Adrian Lopez <liquidlightdigital(at)gmail.com>:

Ummm.. where do I find this SPDL?

On 3/1/07, Pete Edmunds <pete(at)eclipsecreative.co.uk > wrote:

dammit! tried it on another machine and it works!!
weirdness

Pete Edmunds wrote:

i stumbled across this tip about connecting clouds with the sky shader in XSI.

http://mentalraytips.blogspot.com/2007/02/clouds-with-mental-ray-sky.html

he describes it as
"as a spherical environment map plugged into the haze parameter of mia_physicalsky. That's basically it!"

the mia_physicalsky in xsi 6 doesnt let me plug anything into the haze value, so i edited the SPDL from this

    Parameter "haze" input
    {
        GUID = "{A057D5D1-B526-486F-A749-F83EBA55CFD3}";
        Type = scalar;
        Value = 0.0;
    }

to


    Parameter "haze" input
    {
        GUID = "{A057D5D1-B526-486F-A749-F83EBA55CFD3}";
        Type = scalar;
        Texturable = on;
        Value = 0.0;
    }


but i can't seem to get it to work. has anyone tried?

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Liquid Light Digital
Kingston, Jamaica
C:   876.381.2471
W: 876.978.6418

www.liquidlightdigital.com

HD/SD Production | VFX & Animation | Production Management

--
Adrian Lopez
CEO | Director | Producer
Liquid Light Digital
Kingston, Jamaica
C:   876.381.2471
W: 876.978.6418

www.liquidlightdigital.com

HD/SD Production | VFX & Animation | Production Management

--
Adrian Lopez
CEO | Director | Producer
Liquid Light Digital
Kingston, Jamaica
C:  876.381.2471
W: 876.978.6418

www.liquidlightdigital.com

HD/SD Production | VFX & Animation | Production Management

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