Billboard casting shadows problem

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# 1 08-05-2004 , 08:49 AM

Subscriber
Join Date: Oct 2002

Location: Haifa, Israel

Posts: 437

Hi

I am using a billboard for a tree and using the regular alpha chammel technique for the transparency but no matter what I did - the plane still casts shadows upon an object which is behind the plane.

This is inside Mental Ray - Does anyone have a clue ?

NIR

Nir Sullam
Architectural Visualizations Page: www.orvatsel.com/index2.html
Maya Page: www.orvatsel.com/maya
www.nirsullam.com

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# 2 08-05-2004 , 08:54 AM

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attached the image:

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Name: prob.jpg
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Size: 64.4 KB
ID: 15049

Nir Sullam
Architectural Visualizations Page: www.orvatsel.com/index2.html
Maya Page: www.orvatsel.com/maya
www.nirsullam.com

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# 3 08-05-2004 , 01:55 PM

The Maya Mountain
Join Date: Aug 2002

Location: Seattle, WA

Posts: 8,245

can't say I've used Mental Ray, but usually using raytrace shadows works for that. not sure if MR does it differently.

-Mike
The Maya Toolbelt

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# 4 08-05-2004 , 02:01 PM

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Join Date: Oct 2002

Location: Haifa, Israel

Posts: 437

I am not sure it is a bug but I tried every trick I know and some others and still. Fimnally I had to put the tree as a post process in PS.

Thanks

Nir Sullam
Architectural Visualizations Page: www.orvatsel.com/index2.html
Maya Page: www.orvatsel.com/maya
www.nirsullam.com

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# 5 08-05-2004 , 02:11 PM

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Location: Haifa, Israel

Posts: 437

This is the image, unless the client requests a cange it will be the final one.

NIR

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Name: liad.jpg
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ID: 15097

Nir Sullam
Architectural Visualizations Page: www.orvatsel.com/index2.html
Maya Page: www.orvatsel.com/maya
www.nirsullam.com

Last edited by nirsul; 10-05-2004 at 10:24 AM.

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# 6 10-05-2004 , 09:13 AM

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Join Date: Oct 2002

Location: Haifa, Israel

Posts: 437

Still couldn't find out the solution in MR but in Maya Software Renderer it is corrected by using a zero value in Shadow Attenuation (Shader Raytracing Options)

This is a crucial issue for me !

NIR :-(

Nir Sullam
Architectural Visualizations Page: www.orvatsel.com/index2.html
Maya Page: www.orvatsel.com/maya
www.nirsullam.com

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