Hi,
i first thinking that my particles was wrong, but by turning my scene i discovered that the problem is not the particles but the material attached to the GUI.
by the way i tryed many different shaders on the UI, and no one has change the problem.
so, basicaly the UI material is an Unlit/premultiplied color
and the Fx particles in Particles/additive
if i change the UI to defaut diffuse shader, there is no change...
