>>1766720I'm going to reply for the basic fact that you posted that image.
The most direct and effective approach, honestly, would be to take the time and sit down with your mother and talk about it. If you can see yourself only further more appreciating this particular form of art, talk to your mother about how you find it fascinating and can truly appreciate the effort put into such a form. If your mother has any sense of decency, which I have no doubt she does, she'll understand that you are truly fascinated and have found something to be passionate about.
I remember having to talk it over with my mother as well. At first, I mean, she really wasn't understanding or accepting but after awhile I began to show her some incredibly great pieces of artwork such as movies or posters and have actually gotten her understanding in my fascination.