use background shader

Substance Painter

In this start to finish texturing project within Substance Painter we cover all the techniques you need to texture the robot character.

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# 1 23-08-2011 , 01:38 PM

rm3d
Join Date: May 2008

Location: northern ireland

Posts: 184

hey guys a quick question, i like doing matchmoving stuff, but is "use background shader" the best way to add shadows under objects? its just when i use it, i tend to be able to see a faint line or edge where the poly plane i am using to apply the shader to, ends and the actual background takes over (usually its slightly darker where the poly plane is). is it just that i haven't set it up correctly?

the more I Think I know about Maya the less I seem to know about it.

check me out www.rm3d.co.uk

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# 2 23-08-2011 , 03:55 PM

Technical Director
Join Date: Feb 2004

Posts: 2,988

Try scaling up the plane, so you don't get shadows ending.

Imagination is more important than knowledge.

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# 3 23-08-2011 , 04:44 PM

The Nurb Herd
Join Date: Oct 2007

Location: London

Posts: 2,381

sounds like you are using final gather and its bounce light.

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# 4 23-08-2011 , 05:22 PM

rm3d
Join Date: May 2008

Location: northern ireland

Posts: 184

yea honest i am and i noticed that was the problem, if i turned of receive final gather cast on the poly plane it solved the issue, except that the shadow is a lot weaker.

and yea nextdesign thats defiantly the easiest way out user added image

i was just hoping there would be another way for those times that scaling the plane isn't practical

are there different shaders to achieve the same effect?

the more I Think I know about Maya the less I seem to know about it.

check me out www.rm3d.co.uk

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# 5 23-08-2011 , 05:49 PM

The Nurb Herd
Join Date: Oct 2007

Location: London

Posts: 2,381

have you thought about not using FG. it will render quicker, not flicker and you wont have this problem with bounce light.

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# 6 23-08-2011 , 09:57 PM

Technical Director
Join Date: Feb 2004

Posts: 2,988

are there different shaders to achieve the same effect?

Originally Posted by chilledoutredhead

There is a Mentalray specific one actually, mip_matteshadow. You can read more about it here: https://www.mentalimages.com/fileadmi...production.pdf starting on page 38 (Matte Objects and Catching Shadows)

Imagination is more important than knowledge.

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