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I have created the node group, but I can't control the values inside.

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Peter Mortensen
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MikeZski
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    Does this answer your question? Controlling ColorRamp nodes with Group Inputs – Ray Mairlot Apr 05 '20 at 14:11
  • @RayMairlot I think there is another answer since Blender 2.82 which wasn't discussed in the related question, namely with the map range node which is effectively the same as a grayscale color ramp node with 2 stops, but with the obvious advantage of offering input fields. – Gorgious Apr 05 '20 at 14:42
  • @Gorgious Then an answer can be added on the other question. Just because there are new answers, it doesn't mean this isn't a duplicate question. – Ray Mairlot Apr 05 '20 at 15:07
  • @RayMairlot Good point. Will do then. – Gorgious Apr 05 '20 at 15:08
  • @Gorigious The problem is that the topic I have linked has a question about the ColorRamp and that is why it is hard to find. I was looking for a general solution not connected to ColorRamp at all so this thread wasn't visible for me. I have found this thread by some forum where it was linked. So I decided that this is worth to make a post if it saves a few hours of searching. – MikeZski Apr 05 '20 at 18:18

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This issue was discussed in Controlling ColorRamp nodes with Group Inputs post but as Blender workflow get simplified and I wasn't able to find this post druging googling I decided to add another answer.

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Right click on source and choose "copy as New Driver" then go to the target and "Paste Driver". You can use any group node silder as a Driver.

MikeZski
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