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10 comments
I've come across an issue where I am following along but getting a strange issue. My node setup is Text Coord:Object > Vector Multipy > Vector Snap > White Noise Texture > Viewer node. This seems to have worked fine when I used it before, but now I am getting a strange banding/noise artifact across some faces of a cube. It seems that slightly offsetting the repeats or altering the rotation of the noise helps this somewhat, but does not eliminate it in any kind of reliable way. What might be causing this?
@Gary Brimer When you use object coordinates the faces of a defaullt cube are exactly orthogonal to the XYZ axes. That means that there are cases where for example the X coordinate on a face is exactly 1. When you do the snap operation that means the points on the face are right on that edge of either snapping to 1 or to 0, if they are slightly below 1. In theory it should be well-defined if the value is exactly 1 or slightly lower, but because computers only deal with values with a certain accuracy that is not perfect there are some fluctuations. Usually those are so small that you can't notice them, but you are amplifying the issue by snapping the values at exactly that point where they fluctuate.
I hope that makes it understandable :)
@Simon Thommes Thanks for the reply Simon, this does make sense. I was also not understanding that at certain times we are squashing an entire axis onto another, making them both essentially battle for the viewport. It's definitely a mental fight to not see the surface shapes/designs as they appear from these types of things, and instead see them as cross sections of various transformations.
@Gary Brimer The thing about squashing an axis might be a misunderstanding. Multiplying a coordinate by 0 on an axis is like scaling the coordinate system up infinitely on that axis, it is inverse. So different coordinates are not competing.
But maybe I misunderstood your point
What is the difference between Fac and color in Noise texture; value and color in White noise texture? Every time I follow tutorials I confused with such decisions of switching the socket.
@fu233 One outputs a single value, while the other outputs an actual color. So the color basically gives you 3 noises instead of just one (RGB) which you can separate with the Separate RGB node. The value outputs is essentially just the R component of the Color output.
This is an outstanding tutorial. The quality is 10/10
Hi Simon, for me this course is like learning level 100 while i'm still at level 15.. Any suggestion on how to go from level 16 to 99? Can you make more course to get me through those levels step by step? Or do you know good courses that i can learn to be able to understand procedural shading in a more step by step manner?
*@victor p* The idea behind this course is to cover as much of the concepts and techniques that I am using for procedural shading as possible. For the subject matter of procedural shading it is necessary to dive quite deeply into those concepts. Of course, how intuitive the things that I talk about are is very subjective and that makes it impossible to adapt to everyone's individual learning style.
I already structured it in a way that it makes sense on a step-by-step basis, but it is not meant to just be watched in one go. I highly recommend to make use of the workflow examples, but also additionally make your own experiments with the concepts that I present.
*@Simon Thommes* Thanks for the quick reply. Anyway i hope there will be more workflow examples to come.
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