I am not an artist, but rocks tend to have somewhat sharp edges because of their crystalline structure (and in art, to emphasize their 3D-ness). You clearly understand this because I can see it in your rock. If you could shade the center so it looks like it’s sticking out a bit, it might look better/more rock-like
they use proprietary file formats (MOV and HEIC) that need to be converted to a universal format like jpg or MP4 to be viewed on android (I think this can be changed in iPhone settings), and the conversion looks like shit
I am not an artist, but rocks tend to have somewhat sharp edges because of their crystalline structure (and in art, to emphasize their 3D-ness). You clearly understand this because I can see it in your rock. If you could shade the center so it looks like it’s sticking out a bit, it might look better/more rock-like