I am using https://www.sidefx.com/tutorials/workspace/#comment-4199, [www.sidefx.com] as a guide to try apprentice animation, but given I"m doing it exactly right as per url,. noting a few UI differences from that one, which seem minor ISH, why does it not animate in viewport as I press play ?

Are there differences need to take into account to get it to work ?
ty

It's really hard to guess what trouble you might be having without some insight to what you have done. Would you be willing to post your scene file, or perhaps some screenshots?

Just got back home, sorry not before your post, but I missed it prob. not familiar enough ‘yet’ with houdini, turned out I had turned on, accidentally, what it is related to ‘yellow’ marker on one of my nodes (far left).

When I found it removed it, then animation worked fine, so happy its working, pretty neat stuff

Anyway given you're here , is there any way I can add rotation to the current animation ? I looked but given my little know-how as yet with houdini , I'm not finding what I need.

FYI: I just have a mountain node attached to sphere, with color as in tutorial.

TY for posting )