Hi,guys.

I am new in houdini. I want to add color via pointvop in Houdini 16.for example,there is a sphere in the scene,if the points on the sphere above the zero,add a red color,other points add a blue color. I try this vop setup below(as the screen shot),but fail,could you help me? Thank you!

Are you using polygon sphere, or a primitive sphere? The former has points on its surfaces, wheres the primitive sphere has a single point at the center of the sphere (so that setup won't work). Make sure you're not using Primitive Spheres.

Add attribute isn't for setting the value, just for creation. Connect the color to the Cd input on the geometryvopoutput node or a bind/parameter node to output the value instead. The setattrib vop will also allow setting the value, but is slower than using bound attributes.

Thanks all.as what jsmack said,it is working now!