Hi,

I'm a complete beginner in Houdini, i followed a tutorial where i succeeded creating this. I can see the particles in the viewport but i can't in my render view any idea why? Thanks.

I'd say attach a hip file so we can find out what the specific issue is, but one thing I'd suggest is at the obj level, on the geometry node container that contains the particles, go to the Render tab, then go to the Geometry tab. There, change Render As Points to Render Points only. Then change the Render Points to either spheres or circles. This will take pscale into account, so if you still don't see your points, perhaps you have an extremely small pscale value on them.