easy 3d drawing on paper for beginners (drawing a 3d with only single ruler)

3d drawing for beginners, 3d drawing easy, 3d for beginner, 3डी चित्र, 3डी ड्राइंग कैसे बनाएं, step by step 3d drawing, 3 boyutlu çizimler, 3 boyutlu çizimler kolay, 3d çizim, how to draw 3d, easy 3d drawing, 3d, 3d draw, simple 3d drawing, how to draw, 3d çizim kolay, on paper 3d drawing, 3d drawing on paper, çizim yap 3d, çizim yap, #3ddrawing #çizimyap use pencils ..... b pencil, charcoal pencil, charcoal dark pencil and white pencil use paper .... a4 paper (21*29,7)