Hi 
first please excuse the the length of time to reply
thank you for the material




this is what Im trying to do - no straight lines to hide discontinuities ,
 I am unsure why the materiel works with your example but not with mine 
- I played with yours and the ground plane always stayed invisible even 
when sized to deliberately cut the shadow cast :)
my ground plane is an sds surface to reflect the land shape

Alasdair
www.digitalmystic.co.uk


  ----- Original Message ----- 
  From: Andrew Berge 
  To: [email protected] 
  Sent: Tuesday, December 05, 2006 8:49 PM
  Subject: Re: help with material


  Hi,

   If I understand u correctly then this is the shader u need.

  rgds,


  Andrew


  alasdair wrote: 



    above there is a surface for the tank to sit on and cast shadows on which 
are mingled with the background picture
    it is not evident at this size / resolution but the surface is apparent on 
the backgroud pic
    to get this I played with lighting levels but have since forgotten / lost 
the setting :(
    I need a material which only displays if hit by light rays which do not 
recieved light directly any light

    Alasdair

    ----- Original Message ----- 
      From: Neil Cooke 
      To: [email protected] 
      Sent: Tuesday, December 05, 2006 7:12 PM
      Subject: Re: help with material


      Hi Alasdair,

      >a surface where it 
      is directly lit by a light to be invisible but 
      otherwise normally visible

      This seems to me to be a time thing where the object(s) become visible 
when the light is on and becomes invisible when the light is off. If that is 
the case then animate the Fade material (materials library/Constant/Fade) to 
coincide with the light. If the light is to shine on only that object and no 
others then use the Light Sensitivity material.

      But there are a ton of other things you might be referring to so maybe 
I'm completely off target.

      Neil Cooke
        ----- Original Message ----- 
        From: alasdair 
        To: [email protected] 
        Sent: Wednesday, December 06, 2006 2:21 AM
        Subject: Fw: help with material





        dear folks,
        Ive been racking my brain and 
        experimenting with illumination maps etc
        can anyone tell me how to get a surface where it 
        is directly lit by a light to be invisible but 
        otherwise normally visible? does that make sense? :)
        thank you in advance

        Alasdair
        www.digitalmystic.co.uk



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