I try to create a metaball but nothing appears in the viewport, only when I create two metaballs and merge them appears a strange object.


Thanks!

Maybe your viewport LOD settings are too low? Try renaming your houdini10.0 directory something else before starting Houdini.

umm, I try to rename the directory and same result, when I import a metaball from other scene or open a scene of previous version then de metaball appears, only when I create the metaball from 10.0.523 the problem accurs.

Thanks for reply,

Carlos

Two things to check.
1. what is the Weight setting of your metaball sop? If it is a negative number then the metaball won't display.

2. Once you have a metaball in place, whether it is visible or not, turn on the hull display option for the viewport. If the metaball is working at all the hulls will show up.
The Hull display switch is on the right hand tab in the viewport, right below Display Primitive Numbers.