Textures from surrounding object show on transparent objects
Article needs peer review
Symptom
1) Get an object and make it transparent(Get> Material>Phong>Transparency>Color) <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
2) Introduce another object that encompasses the grid and camera, inverse normals(Model>Modify>Inverse Normals) add texture(Render>Texture>Image) and turn of primary rays (so that the object does not render)
<o:p> </P>
<P>Result:<o:p></o:p></P>
<P>If you preview render, the texture from the second object is reflected on the first.<o:p></o:p></P></o:p>
Cause
The texture of the surrounding object is called by any secondary ray and transparency is a secondary ray
Solution
<P>Select the surrounding object. Open the render tree (F7)<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
1) Insert node>switch>ray_type node between phong and material surface node.<o:p></o:p>
2) Connect phong on "reflection" port and make the unconnected parameters black. This will remove the reflection of the encompassing object.<o:p></o:p>
<o:p></o:p>
See the resulting <A href="/support/xsi/private/kb/images/rtree.jpg">Render Tree</A>
References
See the KB article titled <A href="/Support/XSI/private/kb/article.asp?ID=784">"Environment Shader is Visible through Transparent Object"</A> to find a variation of the same problem
Applies To: XSI 1.5,XSI 2.0 on NT,Win2K,Irix
Posted: 11/22/2001
