Please explain logic of this transparency material nodes For the texture coordinates, I take the vector of the plate that is under the cube.
The length of which of the object vectors is taken? And why if I change the 2nd value in &quot;Less Than&quot;, the transparency area increases? After all, the output in &quot;Less Than&quot; must be 0 or 1. This result suits me completely, I just want to figure out how it works.



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This seems to be some form of crude &quot;Wipe&quot; effect.
By using the object's local Z coordinate as input and running through the Less Than math function it basically makes an horizontal line mask.
In the vector node the X and Y axis Scale value to zero is turned down, which makes it basically output the pure Z axis, as opposed to all axis at once which would give a 45º tilted angle. This has basically the same effect as using a Separate XYZ node.
By linking it to transparency it basically makes the object opaque or transparent above/below a certain Z value defined in the Less Than node.