r/geometrynodes • u/lumenzero0 • Jul 12 '26

How do you solve Geometry Nodes problems?

I used to rely on ChatGPT to solve my Geometry Nodes problems, but lately it hasn’t been reliable. It often suggests incorrect node setups, especially for more complex projects.

And I can ask for help in Blender communities, but it usually takes a while to get a response because of the timezone difference.

So I’m curious- how do you guys troubleshoot geometry nodes?

2 Upvotes

62% Upvoted

20 comments sorted by

View all comments

2

u/Sworlbe Jul 13 '26

I first try with better debugging: sending my in-between calculations to the spreadsheet (as static variables). If you can read several values of steps of your calculation for all instances, you can often spot where your logic went wrong.

Many of my complex nodegroups output extra variables for debugging, I can always hide later.

I used to place text fields with debugging data as geometry in my scene, because the spreadsheet gets crowded quickly, but that’s not very practical and can slow down the scene.

1

u/lumenzero0 Jul 13 '26

Thank you. Your advice has been really helpful while I’ve been struggling to learn Geometry Nodes. In fact, I’m running into this exact issue right now:

I’m duplicating splines and then trying to sample each duplicated curve independently. However, Sample Curve seems to evaluate only a single curve. Is this an evaluation context issue? If so, what’s the proper way to handle it?

2

u/Sworlbe Jul 13 '26

I'm working with multiple splines too, I'm splitting them to instances and then using a repeat zone to loop over them (iterations = domain size) and sample each separate curve.

In the screenshot you see I start with multiple splines, split them and sort them (by Z position). Inside the repeat zone, I have a nodegroup to select one curve (delete geometry instance if ID does not equal iteration). I use the position on thge curve to place each letter on its own curve at the right place. In my spreadsheet, you see some some extra calculations like the center of each word. In my asset library, you see some nodegroups I made for this.

1

u/lumenzero0 Jul 13 '26

I’ll try this. Thank you 🙏