Hi all,
I am learning shading and have a question. Like i have two nodes, one is lambertian and the other specular. Now i want to combine this to make a basic surface shader. I try to use different method which is using the add node to add those together and using the mix node to mix it. They give me different result, and seem that i dont like both of them. The add node somewhat make the specular “lost” the color, if i dont add them together, the specular is yellow, but when i add them, the specular is white !
So what is the correct way to combine them ?
And two other question too :twisted: ,how to make a reflective color in VEX builder ? I see some node like reflective and fresnel but dont know how to use it. And the what is the different between illuminance loop and gather loop ? And how to use it ? I have do a search and find that i can use the inline code to write thing for illuminance loop, but how to use them in VOp without writting inline code ?
Found 30 posts.
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Houdini Indie and Apprentice » Combine specular and diffuse in VEX !
- mathmad
- 30 posts
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Houdini Lounge » cmiVFX Launches Houdini Shading And Rendering Video
- mathmad
- 30 posts
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Its what i am waiting for, but i have to wait till 7/21 to be able to purchase it. I have almost all training from cmivfx, they are awsome !
A couple question, do it cover the basic of Vop network and coding ? And do u think that u can make your own materials after watching it ?
Cant wait till i get it
A couple question, do it cover the basic of Vop network and coding ? And do u think that u can make your own materials after watching it ?
Cant wait till i get it
Houdini Indie and Apprentice » Shader :(
- mathmad
- 30 posts
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And one more thing, is the volume material and the normal surface material the same ? Because i explore the volume material network and i dont know where the shader get information about the volume attribute like density, heat…from !
Men, i dont want to give up :twisted:
Men, i dont want to give up :twisted:
Houdini Indie and Apprentice » Shader :(
- mathmad
- 30 posts
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Yeah, you are right Soothsayer, the parameter nodes are everywhere and i dont really know what it is used for ! Like i make a simple Phong shader with allow user to input the diffuse color. I make a parameter node and name it Diffuse color and then plug it to the diffuse channel of the light model node, then plug the light mode node output to the color of the output node. Thats all i know !
I created some material and tried to explore the way it work,….i gave up ! the parameter node are every where !
Do you know where can i find some easy to understand, simple shader network ? Something like a basic glass material or some volume material ? :evil: I guess no cause the build in material are too complicate enough
I created some material and tried to explore the way it work,….i gave up ! the parameter node are every where !
Do you know where can i find some easy to understand, simple shader network ? Something like a basic glass material or some volume material ? :evil: I guess no cause the build in material are too complicate enough
Houdini Indie and Apprentice » Shader :(
- mathmad
- 30 posts
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I really appreciated brianBurke and Tranguz. I have just found this link http://www.andynicholas.com/?p=19 [andynicholas.com] , it look good.
I have used a lot of 3d software, but the only one that i can use the material system quite easy is maya. I am still stuck with XSI shader too. I think the way we build shader in a network style like houdini will be very straighforward, i just didnt get it . Waiting for cmivfx release a training course about that :twisted:. Right now i have finished some training from cmivfx, i am really hunger to make something like a burning fire or a particle effect but stuck right at the shader !
Thanks again, i will post some question in the future.
I have used a lot of 3d software, but the only one that i can use the material system quite easy is maya. I am still stuck with XSI shader too. I think the way we build shader in a network style like houdini will be very straighforward, i just didnt get it . Waiting for cmivfx release a training course about that :twisted:. Right now i have finished some training from cmivfx, i am really hunger to make something like a burning fire or a particle effect but stuck right at the shader !
Thanks again, i will post some question in the future.
Houdini Indie and Apprentice » Shader :(
- mathmad
- 30 posts
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Hi all,
How did you start with shader in Houdini ? I am stuck ! Example, i want to implement a basic phong shader in Vop, how can i do that ? I came from XSI, and i want to do something like,…a shader that when the normal point directly to the camera, the surface will be transparent, the far away from the camera the normal point to, the surface become less transparent, how…? Really messed up.
…I read some renderman book, let say i can translate renderman code to mantra, but from the code i want to build the same shader using the Vex network builder instead of compiling the code,….. no clue ..
And i cannot find some example in the document, i dont know why the document have nothing about building shader in Vex Network builder, or i just blind :shock:
How did you start with shader in Houdini ? I am stuck ! Example, i want to implement a basic phong shader in Vop, how can i do that ? I came from XSI, and i want to do something like,…a shader that when the normal point directly to the camera, the surface will be transparent, the far away from the camera the normal point to, the surface become less transparent, how…? Really messed up.
…I read some renderman book, let say i can translate renderman code to mantra, but from the code i want to build the same shader using the Vex network builder instead of compiling the code,….. no clue ..
And i cannot find some example in the document, i dont know why the document have nothing about building shader in Vex Network builder, or i just blind :shock:
Technical Discussion » Question about display !
- mathmad
- 30 posts
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Thanks for the trick, graham. But its not as cool as XSI. I am XSI user and i miss its display option.
Technical Discussion » Question about display !
- mathmad
- 30 posts
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Hi all,
Is it possible for houdini to display a particular object in wireframe mode while other objects are in shade mode ?
Thanks
Chuong
Is it possible for houdini to display a particular object in wireframe mode while other objects are in shade mode ?
Thanks
Chuong
Technical Discussion » Basic Vex Pop question !
- mathmad
- 30 posts
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Hi omegan,
I got it , thanks so much. It was my logic problem, not the technique .
Chuong
I got it , thanks so much. It was my logic problem, not the technique .
Chuong
Technical Discussion » Basic Vex Pop question !
- mathmad
- 30 posts
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Hi,
I am learning to create Vex Pop to control the particle system the way i want. The problem is i dont know how to set position for particles in Vop network. The output node and global node in Vex builder network have the P parameter. Is it the position of a particle ? and how can we set it in the Vex builder network ? example i want to set the position of all particles emitted (0,3,0), how can i do that ?
About the velocity, i can manually change it with the V parameter of the global node and the output node. But cannot do the same thing for the P which i guess is the position of particles.
Any hint would be helpfull and appreciated
Thanks
Chuong
I am learning to create Vex Pop to control the particle system the way i want. The problem is i dont know how to set position for particles in Vop network. The output node and global node in Vex builder network have the P parameter. Is it the position of a particle ? and how can we set it in the Vex builder network ? example i want to set the position of all particles emitted (0,3,0), how can i do that ?
About the velocity, i can manually change it with the V parameter of the global node and the output node. But cannot do the same thing for the P which i guess is the position of particles.
Any hint would be helpfull and appreciated
Thanks
Chuong
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