Geometry Nodes - how to get data from multiple Image node Frames

[example.sk]

Hi everyone, I’m still getting used to the new Geometry Nodes.

Here is my setup:

NodeGroup detail:

Here is my output:

AudVis - Rain Nodes Demo

Blend file: https://example.sk/audvis/demo/duplicated-node-groups.blend
Zip file with used images: https://example.sk/audvis/demo/audvis-spectrogram.zip

What I’m doing here is animating grid by image sequence, second layer grid is 1 frame behind, third layer grid is 2 frames behind…

It works, but in this setup, it’s not easily scalable. Every single added layer is done by copying a NodeGroup, incrementing “Index” parameter, and linking the group.

I tried to avoid this step by using array modifier and using location Z as input to “Frame” in “Image Texture” node, but it doesn’t work.

Does anyone have better understanding of Geometry Nodes to help me out?

[example.sk]

Here is dummy version what I’m trying to do:

But I can’t because of this:

I guess the round shape of the “Frame” socket has something to do with this. Any ideas how to overcome this issue?

[chevalsb]

I think the Frame input take an integer value and your Z output is a float one. You need to round Z value probably.