Thanks for the reply. I have deactivated child theme and turned on Enfold Theme, updated to last version, and all works fine. But I need child to costumizations.
Regards,
Alfredo.

Hi Dude.
Yes I’have fixed the problem!:)
Thanks for your reply.

Hi Ismael.
Thank you for fast reply. I post a screen shot of hover effect with an image taken from the other post to make a try.

I’ve added this quick css change:

.image-overlay.overlay-type-extern .image-overlay-inside::before{
	content: url(https://1.gravatar.com/avatar/707b60c56bd8d542ae9f872631c1aefa?s=80&d=http%3A%2F%2F1.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D80&r=G);
}

Now, how you can see into the screen shot i have the image into the hover effect into a portfolio category page.
I need to have different hover images for different pages i’ll create linked to different categories of portfolio.
Thanks and regards,
Alfredo.