@Alfred Lam While the video obviously contains more explanation and reasoning, the resulting node-tree should be identical.

@Alfred Lam This video is over 30 minutes long and I recorded it years ago. Could you specify where in the video you are talking about?

@Simon Thommes That node is in the example file, but wasn't mentioned in the video.

@Alfred Lam There is automatic versioning for new Blender versions in place that adds nodes to make node setups compatible with new versions of Blender. So this node is added automatically. If you open the file wiuth the Blender version it was originally created with, this won't happen and you will see that the node isn't actually in the file.

@Thea Leverton Rose Thanks a lot for all the kind words, I'm glad that the course is helping!

@sunmin kim There is a new setting in the Mesh Boolean node to select a precision mode. This is set to Float by default. Try setting it to Exact instead. that should solve your issue.

@Paul Chamberlain Since node tools have been added there is a Usage panel in the node-group settings now to specify where the node-group should show up. There you need to enable Modifier. This is set by default when you create an new node-group as a modifier, but when you create it in the node-tree it is not.

@Simon Thommes thanks for following up on these. The clarifications and updates based on the version developments have been lifesavers.

@Simon Thommes Thanks so much for the quick response, that solved the issue. Awesome course, I'm learning a lot from this!

@Toshinari Yanagi Geometry Nodes are directly integrated into the Blender code. That means that the toolset is much more grounded and compatible with the rest of Blender. Animation Nodes, as an addon have the benefit that they can develop independently and are not restricted with their design and performance, which makes the development a bit more free and fast.

But in the long run, pretty much everything you can do with animation nodes should be available in Blender by itself, be that with Geometry Nodes, or future additional node systems.

Also: The original author of the Animation Nodes addon, Jacques Lucke, is the lead developer on the Geometry Nodes project. Afaik he himself is not much involved with maintaining and expanding animation nodes anymore.

@Simon Thommes Thanks for your reply. That was great to hear and very refreshing! I started with the animation node rather than the geometry node and was wondering which one I should keep using. But thanks to you I have solved it. ありがとうございました！

@Alex Dumproff Nice! Yea, degrees are nice as they give you a pretty intuitive unit with easy to remember key values, but when you are doing trigonometry radians are usually the way to go

@Mark Leniw The reason for the second multiply node is that I want to expose a factor to the modifier input. But I don't want to expose the factor as it is, because the scaling is not very useful. To get a better sensitivity when you are changing the slider I'm multiplying the input value with 0.02 in this case to get much smaller values.

@yang.animator I think you are referring to the Vector Math node in Scale mode.

@Chris Abbas It looks like that changed indeed. Apparently by default now the curve primitives don't have a default radius anymore, now that a new data structure is used for curves. But that doesn't effectively change anything. You can still set and use that radius attribute like before.

Blender is still in the process of undergoing the switch from the old curve type to the new one, so some differences like this are going to ocurr for a while, thanks for pointing it out :)

@Simon Thommes I see, thanks very much for the information! I appreciate your time, and this fantastic tutorial series. Cheers.

@Tyler Smith This is not how geometry nodes work currently. There are plans to add the functionality of iterating in loops in the future as well, but currently that's not how it works. The way it works instead is basically that an operation is done on all elements of a domain in parallel using a set of inputs (attributes). So with your example this would work by taking the whole geometry and applying the material, but using the selection input to run the operation only on a subset of the geometry. That selection is a field that can be generated in various ways. Using the spline index and comparing it to a value is definitely one of those ways.

But the most important thing to understand here is that there is a clear data flow for the geometry and every operation uses the inputs that are attached to the geometry as attributes. The future idea of using loops is not going to replace this as the main workflow, but give an alternative/new opporunities.

@Simon Thommes Hi [image didn't embed/upload]... so I tried dragging out from the Rotational Array frame's [Index] to a [Greater than :: 2] node to a [set material :: blue] from the previous trim side's panel's [set material :: tree], but that makes part of each rotated branch blue, instead of several whole branches blue... (it looks like that indexes the branchMesh vertices instead of Rotational Array frame [mesh line] index...) Thanks for your previous comment;  instead of thinking of it as loops then the question can become how do I make a subset of my tree geometry (1 or some branches) blue instead of green. Whenever you get the chance; thank you for your time!🐧🐉

Also after connecting the second transform for correcting normals and mirroring — I can see nothing in the viewport. With "Hole tolerant" or without that option turned on. Thoughts what I might be doing wrong?

@Eimantas Vaičiūnas I'm not sure what the issue is. I tried doing the same steps again as I show in the video and it works fine for me. One thing that could result in the same effect would be if you rotated the first plane in the wrong direction on the Z axis. Other than that the boolean node can sometimes fail, even with Hole Tolerant on. Try wiggling the Z rotation value and see if it works for other angles.

Otherwise maybe try redoing the previous steps.

@Simon Thommes I had the same problem as @Eimantas. Apparently, the original values of the original Arc geometry need to be just right. Slight differences in the Y/Z values for middle and end will 'toggle' between the cross-section and a the desired slice effect.

@Simon Thommes I redid everything from the beginning and somehow this time all started working. I went through those steps slowly and repeatedly and all went well. Thanks!

@chriskamau5 To some degree, yes. The functions that are exposed to you with geometry nodes are very different to what is exposed in the python API, and they are much more performant than what you could implement with python only. So in that sense they are quite different. But in the general idea, geometry nodes are a visual programming language and you can think of using them like coding.

@Jim Conrad Yes, definitely. The difference is that then you'd also have to make sure the instance rotation follows the tangent of the curve. But that's a great idea, there are always multiple ways to doe something with nodes :)

@Kevin Healy Thank you :)

@Fatih Pehlevan There are no tools for UV unwrapping specifically in Geometry Nodes yet. Those will come eventually though. You can opt for procedural shading methods where you don't rely on UVs or try to output Attributes that you use as texture coordinates, like UVs. UVs are also just a vector attribute.

@Simon Thommes I don't think procedural shading will be an option for me because I'll export things to Unreal. I'm gonna create a parkour for a game and thinking about creating different pieces of the parkour with using a geometry nodes setup because they'll have a lot of common parts in them. Kind of resembles the rock generator. I'll probably texture parkour pieces in Unreal or Substance Painter so I have a feeling that I'll still need to uv unwrap every piece manually to get good results with texturing in a different software. I'm also a newbie to geometry nodes so maybe I need to do more research into this to understand how the second part you mentioned in your comment can help me in uv unwrapping and exporting process.

@Fatih Pehlevan For UV unwrapping comlex model procedurally you will need to wait for geometry nodes to have nodes for this out-of-the-box or use additional scripts that automate the process separately instead. The other thing that I was describing of build the UVs with nodes is really quite cumbersome and complicated, involves a bunch of math and is only really viable for quite simple models because of that.

@Simon Thommes Got it. Thank you for being generous and sparing your time to read and answer my questions Simon. Much appreciated!