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I need help to build a node tree which would allow me to skip every odd frame in the object's animation. Basically, I need a tool that behaves just like a stepped modifier but in geometry nodes.

Reason

My object can be either an alembic or a sequence obj which means it doesn't have keyframes to which I could apply a stepped modifier. I also need the object to be the only one that skips frames whilst the rest of the scene runs at 24 fps, so I can't use 12 fps globally.

OBJ Sequence test

I found this node tree on the web that converts the obj sequence to animation. Unfortunately I am only able to slow down the animation meaning that, although one position takes 2 frames, the overall animation is twice as long. I need one position to hold for two frames, but the animation to still have the same length, meaning it sort of throws away every other frame.

node tree screenshot

ALEMBIC test

I have no idea what a node tree for alembic would look like, :-) but we managed to make the tool I need in Cinema 4D using Xpresso, I believe it can be done in blender as well.

I would be grateful for any advice :-)

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1 Answer 1

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Looks like you can replace your Divide with a Snap (still a Math node so just use the dropdown), setting Increment to 2.

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  • $\begingroup$ Wow, that was quick thanks a lot, this works. Any idea how to solve it for the alembic? Do you know what the node tree should look like? $\endgroup$ Mar 18, 2023 at 9:47
  • $\begingroup$ Sorry, I don't know anything about Alembic. $\endgroup$
    – Nick H
    Mar 18, 2023 at 9:53
  • $\begingroup$ Nevermind thank you for advice :-) $\endgroup$ Mar 18, 2023 at 10:01

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