Want to pursue a PhD in Philosophy, but my Master degree is in Fine Arts (Painting). I want to know how likely will I be considered for the program? I have art history and Aesthetics, as my theory in Bfa and Ma.
Your above assertion truly postulates about the lack of appropriate trace for any effective and bold philosophical studies or research within your previous degree.
Composition of a coherent and powerful SoP sounds indispensable for you. You must pinpoint your motivation to switch from painting to philosophy, at first. Then, as Ph.D. studies and research in any field do need a robust background from the fundamental subjects, you could mention your self-studies within this territory to convince the admission committee upon your rather-structured mental background for pursing the new path.
In my estimation, the more functional approach would be digging into the other Master degree in philosophy, to construct your background in a fully-persuading fashion, and then taking the attempt into account for the Ph.D. admission.
Best of luck..