I am trying to make the radius be based on the index of the duplicate instances, but Blender is showing a red line. I am a beginner not sure what is going on.
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1It seems that you have a loop between the Duplicate Elements node and the Curve Circle node. You can not use the output socket Duplicate Index connected to the input socket Radius as the output socket Curve is connected to the input socket Geometry. About red lines, may I recommend to read this post: Why is there a red line when I try to connect one node to another? ? – StefLAncien Feb 26 '24 at 20:44
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Also in this case you have a circular reference. Which node is supposed to be evaluated first? :) – Markus von Broady Feb 26 '24 at 21:34
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(Using Blender 3.6.8)
Nodes such as Scale Instances, Translate Instances and Rotate Instances are useful after a Duplicate Elements node set in Instance domain to take advantage of the Duplicate Index socket. However, the input geometry must be converted to an instance before, using a Geometry to Instance node:
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StefLAncien
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Wow..... this is exactly what I wanted, but I do have one question though.. what if I want to realize all the instances not just 5? – Homelander Feb 27 '24 at 13:05
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Could you explain what you mean by "to realize" ? Because in Blender, realize has a specific meaning for instances, so I am confused. Do you want to control from the modifier panel (on the right hand side of GUI) how many rings are generated ? – StefLAncien Feb 27 '24 at 13:15
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Like in the viewer spreadsheet thing there is only 5 instances being shown, but theres clearly WAY more then that – Homelander Feb 27 '24 at 13:17
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We have nested instances: level 1 is 5 rings, level 2 is 9 points per ring. The spreadsheet seems to display only the first level, so 5. But if you add a Realize Instances node just before the Group Output node, you will see 45 points in the spreadsheet. – StefLAncien Feb 27 '24 at 13:47
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Yeah but I tried that and it like reset the scale for all the points though, why does this happen? – Homelander Feb 27 '24 at 13:54
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It is because the Realize Instances node is making copies of the same "original" point. So all points have the same radius and scaling a point does not change its radius, only its position. To go further, could you specify if you would like to have instances (i.e. sharing properties) or individual points (i.e. with specific properties) at the output of the GN modifier? By construction of instances, you can not have both... – StefLAncien Feb 27 '24 at 16:40
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Sir, I just want them to be each their own indiviual points so I can have all 45, that's all I am asking but thank you for your patience and explanation of everything thus far – Homelander Feb 27 '24 at 17:36
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Great ! Could you share your findings by editing your question and adding your updated GN graph ? – StefLAncien Feb 27 '24 at 18:35