melany Posted July 27, 2003 Share Posted July 27, 2003 I created a shader in houdini vops mode, mixing a default marble shader and a default mold shader as I had to texture a cg statue. I animated a cg camera which zooms toward the statue in order to have a close up of the face. As the camera moves in ,the noise of my shaders flickers. I have already a rest position node in my network, infact my shader is still, but i have this prolem with the noise function... Does anybody can help me to solve this problem, please? thank you, Melany Quote Link to comment Share on other sites More sharing options...
frading Posted July 27, 2003 Share Posted July 27, 2003 I had a similar problem when discovering houdini. The problem you have is that the noise is mving with your camera. Actually, here, your noise needs to know the P variable. By default the noise will take the necessary global variable, but it will be expressed in the camera space ( in houdini, world space is the camera space ), so you have to convert it to object space with a space change VOP. Quote Link to comment Share on other sites More sharing options...
Michael1 Posted August 5, 2009 Share Posted August 5, 2009 Time to dig out an old post, I'm having a similar problem, I have an object with a noise displacement on it and as my camera moves the noise is moving with it. The object is also being scaled up as the camera moves - I don't know if that adds to the complexity. But basically I have a moving camera and a scaling object. How do I go about solving this problem, I couldn't find a space change vop inside my shader as mentioned in this post. Michael1 Quote Link to comment Share on other sites More sharing options...
raven0us Posted August 5, 2009 Share Posted August 5, 2009 Look for "Transform" vop. space.hipnc Quote Link to comment Share on other sites More sharing options...
Michael1 Posted August 5, 2009 Share Posted August 5, 2009 Look for "Transform" vop. Thanks Quote Link to comment Share on other sites More sharing options...
raven0us Posted August 6, 2009 Share Posted August 6, 2009 (edited) Use "Rest Position" vop... if the object is deforming.... Then your geometry needs the rest attribute.Use the "Rest Position" sop for that.See file attached. space-restPos.rar space-polyDeform.rar Edited August 6, 2009 by raven0us Quote Link to comment Share on other sites More sharing options...
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