a simple alpha question 2004-03-04 - By Andi Farhall
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I get the feeling that speculars and reflections are additive
-- --Original Message-- --
From: Chris Marshall [mailto:chris@(protected)]
Sent: 04 March 2004 13:41
To: XSI@(protected)
Subject: RE: a simple alpha question
The question is, why does it not work the way you expect it to?
-- --Original Message-- --
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)]On Behalf Of
alex dinnin
Sent: Thursday, March 04, 2004 1:24 PM
To: XSI@(protected)
Subject: Re: a simple alpha question
Thanks everyone for your help on this !!! Finally cracked it !! I will save
it as a DS Preset and whack it on the xsi site should you be interested....
thanks Alexei !!!!!!!!!!!!!
Sandy Sutherland <sandy@(protected)> wrote:
Put a RayType node on the reflection sphere and set everything but
reftection to black!
S.
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- -----
Sandy Sutherland Digital Doodeller/Technical Director
TThe Refinery (Cape) http://www.refinery.co.za <http://www.refinery.co.za/>
mailto:sandy@(protected) <mailto:sandy@(protected)>
(P) (+27 21) 480 3333 (F) (+27 21) 480 3101
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- -----
-- -- Original Message -- --
From: alex <mailto:adinnin@(protected)> dinnin
To: XSI@(protected) <mailto:XSI@(protected)>
Sent: Thursday, March 04, 2004 1:59 PM
Subject: Re: a simple alpha question
Thats almost it... but why are there no holes in it !!! you can still see
the reflection sphere where there should be nothing ???
Sandy Sutherland < sandy@(protected) <mailto:sandy@(protected)> >
wrote:
Try adding this to your previous posted code and then look at the render
tree for the sphere!
'++++++++++++++++ Code Starts Here
CopyPaste , "Shaders\Texture\Image_Processing\Invert.Preset",
"TransientObjectContainer"
CopyPaste , "Shaders\Texture\Image_Processing\Intensity.Preset",
"TransientObjectContainer"
CopyPaste , "Shaders\Texture\Image_Processing\Intensity.Preset",
"TransientObjectContainer"
SIConnectShaderToCnxPoint "sphere.Material.Phong.Checkerboard",
"TransientObjectContainer.Invert.input"
SIConnectShaderToCnxPoint "TransientObjectContainer.Invert",
"TransientObjectContainer.Intensity1.input"
SIConnectShaderToCnxPoint "TransientObjectContainer.Intensity1.Invert",
"TransientObjectContainer.Intensity.input"
SIConnectShaderToCnxPoint "TransientObjectContainer.Intensity",
"sphere.Material.Phong.reflectivity"
SIConnectShaderToCnxPoint "TransientObjectContainer.Intensity1",
"sphere.Material.Phong.specular"
'+++++++++++++++Code ends here
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- -----
Sandy Sutherland Digital Doodeller/Technical Director
TTThe Refinery (Cape) http://www.refinery.co.za
<http://www.refinery.co.za/>
mailto:sandy@(protected) <mailto:sandy@(protected)>
(P) (+27 21) 480 3333 (F) (+27 21) 480 3101
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- -----
-- -- Original Message -- --
From: alex <mailto:adinnin@(protected)> dinnin
To: xsi@(protected) <mailto:xsi@(protected)>
Sent: Thursday, March 04, 2004 12:40 PM
Subject: a simple alpha question
I'm sorry I am really going back to basics here... but I am pulling my hair
out trying to crack it... and I have failed !!!
Below is a simple script, I have made two spheres a small one and a big one
for reflections
I have plugged a checker texture in to control the transparancy !!!
why can I see reflections and specular where there should be clean holes
??????
Please HELP
ALEX
SCRIPT STARTS HERE >>>>
NewScene
CreatePrim "Sphere", "NurbsSurface"
Duplicate "sphere", , 2, 1, 1, 0, 0, 1, 0, 1, , , , , , , , , , , 0
SetValue "sphere1.sphere.radius", 50
ApplyTopoOp "Inverse", "sphere1", 3, siPersistentOperation
ApplyShader , , , , siLetLocalMaterialsOverlap
BlendInPresetsInsp , , , True, siReplaceNoBlend
SetValue "sphere1.visibility.primray", False
SetValue "sphere1.visibility.viewvis", False
SetAndToggleSelection "sphere", , True
ApplyShader , , , , siLetLocalMaterialsOverlap
CopyPaste , "Shaders\Texture\Checkerboard.Preset",
"TransientObjectContainer"
SIConnectShaderToCnxPoint "TransientObjectContainer.Checkerboard",
"sphere.Material.Phong.transparency"
SetValue "sphere.Material.Phong.reflectivity.red", 0.483
SetValue "sphere.Material.Phong.reflectivity.green", 0.483
SetValue "sphere.Material.Phong.reflectivity.red", 0.49
SetValue "sphere.Material.Phong.reflectivity.green", 0.49
SetValue "sphere.Material.Phong.reflectivity.red", 0.503
SetValue "sphere.Material.Phong.reflectivity.green", 0.503
SetValue "sphere.Material.Phong.reflectivity.red", 0.538
SetValue "sphere.Material.Phong.reflectivity.green", 0.538
SetValue "sphere.Material.Phong.reflectivity.red", 0.549
SetValue "sphere.Material.Phong.reflectivity.green", 0.549
SetValue "sphere.Material.Phong.reflectivity.red", 0.51
SetValue "sphere.Material.Phong.reflectivity.green", 0.51
SetValue "sphere.Material.Phong.reflectivity.red", 0.497
SetValue "sphere.Material.Phong.reflectivity.green", 0.493
SetValue "sphere.Material.Phong.reflectivity.red", 0.486
SetValue "sphere.Material.Phong.reflectivity.green", 0.486
SetValue "sphere.Material.Phong.reflectivity.red", 0.503
SetValue "sphere.Material.Phong.reflectivity.green", 0.503
SetValue "sphere.Material.Phong.reflectivity.red", 0.507
SetValue "sphere.Material.Phong.reflectivity.green", 0.507
SetValue "sphere.Material.Phong.reflectivity.red", 0.503
SetValue "sphere.Material.Phong.reflectivity.green", 0.503
SetValue "sphere.Material.Phong.reflectivity.red", 0.5
SetValue "sphere.Material.Phong.reflectivity.green", 0.5
SetValue "sphere.Material.Phong.reflectivity.blue", 0.5
CreateProjection "sphere", siTxtUV, siTxtDefaultPlanarXY, ,
"Texture_Projection"
SelectObj "sphere1"
CreateProjection "sphere1", siTxtUV, siTxtDefaultSpherical,
"Texture_Support", "Texture_Projection"
SetInstanceDataValue , "sphere1.Material.Phong.Image.tspace_id",
"Texture_Projection"
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<DIV><SPAN class=109535913-04032004><FONT face=Arial color=#0000ff size=2>I get
the feeling that speculars and reflections are additive</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-- --Original Message-- --<BR><B>From:</B> Chris Marshall
[mailto:chris@(protected)]<BR><B>Sent:</B> 04 March 2004
13:41<BR><B>To:</B> XSI@(protected)<BR><B>Subject:</B> RE: a simple alpha
question<BR><BR></FONT></DIV>
<DIV><SPAN class=277234013-04032004><FONT face=Arial color=#0000ff size=2>The
question is, why does it not work the way you expect it
to?</FONT></SPAN></DIV>
<DIV><SPAN class=277234013-04032004></SPAN> </DIV>
<BLOCKQUOTE>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-- --Original Message-- --<BR><B>From:</B> owner-xsi@(protected)
[mailto:owner-xsi@(protected)]<B>On Behalf Of </B>alex
dinnin<BR><B>Sent:</B> Thursday, March 04, 2004 1:24 PM<BR><B>To:</B>
XSI@(protected)<BR><B>Subject:</B> Re: a simple alpha
question<BR><BR></FONT></DIV>
<DIV>Thanks everyone for your help on this !!! Finally cracked it !!
I
will save it as a DS Preset and whack it on the xsi site should you be
interested....</DIV>
<DIV> </DIV>
<DIV>thanks Alexei !!!!!!!!!!!!!</DIV>
<DIV> </DIV>
<DIV><BR><B><I>Sandy Sutherland <sandy@(protected)></I></B>
wrote:</DIV>
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<META content="MSHTML 6.00.2800.1276" name=GENERATOR>
<DIV><FONT face=Arial size=2>Put a RayType node on the reflection sphere
and set everything but reftection to black!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>S.</FONT></DIV>
<DIV> </DIV>
<DIV>-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- -----<BR>Sandy
Sutherland Digital Doodeller/Technical Director<BR>TThe Refinery
(Cape) <A
href="http://www.refinery.co.za/">http://www.refinery.co.za</A><BR><A
href="mailto:sandy@(protected)">mailto:sandy@(protected)</A><BR>(P)
(+27 21) 480 3333 (F) (+27 21) 480
3101<BR>-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- -----</DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER
-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">-- -- Original Message -- -- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B
>From:</B>
<A title=adinnin@(protected) href="mailto:adinnin@(protected)">alex
dinnin</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=XSI@(protected)
href="mailto:XSI@(protected)">XSI@(protected)</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, March 04, 2004 1
:59
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: a simple alpha
question</DIV>
<DIV><BR></DIV>
<DIV>Thats almost it... but why are there no holes in it !!! you can
still see the reflection sphere where there should be nothing
???<BR><BR><B><I>Sandy Sutherland <<A
href="mailto:sandy@(protected)">sandy@(protected)</A>></I></B>
wrote:
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px
solid">
<META content="MSHTML 6.00.2800.1276" name=GENERATOR>
<STYLE></STYLE>
<DIV><FONT face=Arial size=2>Try adding this to your previous posted
code and then look at the render tree for the sphere!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>'++++++++++++++++ Code Starts
Here</FONT></DIV>
<DIV><FONT face=Arial size=2><FONT size=2>
<P>CopyPaste , "Shaders\Texture\Image_Processing\Invert.Preset",
"TransientObjectContainer"</P>
<P>CopyPaste , "Shaders\Texture\Image_Processing\Intensity.Preset",
"TransientObjectContainer"</P>
<P>CopyPaste , "Shaders\Texture\Image_Processing\Intensity.Preset",
"TransientObjectContainer"</P>
<P>SIConnectShaderToCnxPoint "sphere.Material.Phong.Checkerboard",
"TransientObjectContainer.Invert.input"</P>
<P>SIConnectShaderToCnxPoint "TransientObjectContainer.Invert",
"TransientObjectContainer.Intensity1.input"</P>
<P>SIConnectShaderToCnxPoint
"TransientObjectContainer.Intensity1.Invert",
"TransientObjectContainer.Intensity.input"</P>
<P>SIConnectShaderToCnxPoint "TransientObjectContainer.Intensity",
"sphere.Material.Phong.reflectivity"</P>
<P>SIConnectShaderToCnxPoint "TransientObjectContainer.Intensity1",
"sphere.Material.Phong.specular"</P>
<P>'+++++++++++++++Code ends here</P>
<P> </P></FONT></FONT></DIV>
<DIV>-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- -----<BR
>Sandy
Sutherland Digital Doodeller/Technical Director<BR>TTThe
Refinery (Cape) <A
href="http://www.refinery.co.za/">http://www.refinery.co.za</A><BR><A
href="mailto:sandy@(protected)">mailto:sandy@(protected)</A><BR
>(P)
(+27 21) 480 3333 (F) (+27 21) 480
3101<BR>-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- -----<
/DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px;
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">-- -- Original Message -- -- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B
>From:</B>
<A title=adinnin@(protected) href="mailto:adinnin@(protected)">alex
dinnin</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=xsi@(protected)
href="mailto:xsi@(protected)">xsi@(protected)</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, March 04, 2004
12:40 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> a simple alpha
question</DIV>
<DIV><BR></DIV>
<DIV>I'm sorry I am really going back to basics here... but I am
pulling my hair out trying to crack it... and I have failed
!!!</DIV>
<DIV> Below is a simple script, I have made two spheres a
small
one and a big one for reflections</DIV>
<DIV>I have plugged a checker texture in to control the
transparancy !!! </DIV>
<DIV> </DIV>
<DIV><STRONG>why can I see reflections and specular where there
should be clean holes ??????</STRONG></DIV>
<DIV><STRONG><EM><U></U></EM></STRONG> </DIV>
<DIV><STRONG><EM>Please HELP</EM></STRONG></DIV>
<DIV><STRONG><EM><U></U></EM></STRONG> </DIV>
<DIV><STRONG><EM>ALEX</EM></STRONG></DIV>
<DIV><STRONG><EM><U></U></EM></STRONG> </DIV>
<DIV><STRONG>SCRIPT STARTS HERE >>>></STRONG></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>NewScene</DIV>
<DIV>
<P>CreatePrim "Sphere", "NurbsSurface"</P>
<P>Duplicate "sphere", , 2, 1, 1, 0, 0, 1, 0, 1, , , , , , , , , ,
,
0</P>
<P>SetValue "sphere1.sphere.radius", 50</P>
<P>ApplyTopoOp "Inverse", "sphere1", 3, siPersistentOperation</P>
<P>ApplyShader , , , , siLetLocalMaterialsOverlap</P>
<P>BlendInPresetsInsp , , , True, siReplaceNoBlend</P>
<P>SetValue "sphere1.visibility.primray", False</P>
<P>SetValue "sphere1.visibility.viewvis", False</P>
<P>SetAndToggleSelection "sphere", , True</P>
<P>ApplyShader , , , , siLetLocalMaterialsOverlap</P>
<P>CopyPaste , "Shaders\Texture\Checkerboard.Preset",
"TransientObjectContainer"</P>
<P>SIConnectShaderToCnxPoint
"TransientObjectContainer.Checkerboard",
"sphere.Material.Phong.transparency"</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.483</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.483</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.49</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.49</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.503</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.503</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.538</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.538</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.549</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.549</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.51</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.51</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.497</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.493</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.486</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.486</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.503</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.503</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.507</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.507</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.503</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.503</P>
<P>SetValue "sphere.Material.Phong.reflectivity.red", 0.5</P>
<P>SetValue "sphere.Material.Phong.reflectivity.green", 0.5</P>
<P>SetValue "sphere.Material.Phong.reflectivity.blue", 0.5</P>
<P>CreateProjection "sphere", siTxtUV, siTxtDefaultPlanarXY, ,
"Texture_Projection"</P>
<P>SelectObj "sphere1"</P>
<P>CreateProjection "sphere1", siTxtUV, siTxtDefaultSpherical,
"Texture_Support", "Texture_Projection"</P>
<P>SetInstanceDataValue , "sphere1.Material.Phong.Image.tspace_id",
"Texture_Projection"</P></FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
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