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Create two node groups ( or two simple shaders ) in one material ( each act as a separate material ) you will use one output and a mix shader, the mixing factor comes from a comparison against a kno …

You can store the face ID as a vertex color o each face then read the vertex color using the Attribute node. This script will create a vertex color layer and store the face index as color : import bp …

Use a math node and set it to Minimum and plug the Alpha output and the Front/Back output to it then connect the result to the Alpha input of the Output node. this way the the back faces will be total …

probably this material has been created for the blender render engine (by default nodes are disabled ) so you just have to enable using nodes before accessing the node tree by the following line : mat …

You can use the List-Item node with Int Range which will delete some points along the X axis depending on the step you set in the Int Range node : ( change the step to get different results )

node_socket_copy_default_value() seems to be responsible for moving data between node sockets, but it doesn't go along with the real behavior so I may be wrong, and here is some links further invistig …

By looking at the source code and the note saying : /* Vector combine / separate, used for the RGB and XYZ nodes */ They are the same, and they don't use one node probably just to avoid confusi …

You can use the Set Alpha node found in : Add➝Converter➝Set Alpha use the mask node output as an Alpha input for the Set Alpha node :

The problem is that the texture coordinates node is not outputting a UV coordinates it is a genereted 3D coordinates ranging from 0 to on each axis ( X,Y and Z ) and since the Sphere mapping is not li …

I have experimented with it and this is what i come up with : The active_output is not a node type so it will not contain the active output node, it is NodeSocketInterface ( i don't know what this i …

The my_node.inputs[0] is a node Socket type, and the my_node.inputs[0].links is a read only list of links from this socket, so your first attempt won't work, and you have found the correct way, which …

Select the nodes you want to group and click Create a node group . To put nodes in a frame select them then hit Shift+P .

The background is emitting light (by default). You can see the setting of the world background in the world Tab:

you can do the clipping in the material nodes and make the clipped points transparent : if you set the value of the math node to the clipping_start of the camera then what is clipped by the camera …

The parameter A stands for alpha, which is the transparency channel. An alpha value of zero represents full transparency and a value of 1.0 represents a fully opaque pixel. The RGB values are not affe …