i don´t know why, but the blobby surface particles dissapear when i put them inside or behind a material with refraction. It happens in mental ray and maya software.

I used diferent materials, but same happens.

This is not a raytrace problem, since i put the maximum atributtes in render settings!

when i change the type of the particles to sphere they work normal.

Does anybody have an idea of what is going wrong ?!