3D model generation prompt: Create a Japanese Oni Samurai character with the following specifications: CHARACTER DESCRIPTION: - Wears a traditional Japanese demon/samurai mask (Oni masks with horns and fierce expression) - Equipped with classic samurai armor (rectangular lamellar plates, shoulder guards, chest plate) - Holding a katana or tachi sword - Aggressive, powerful battle stance MANDATORY TECHNICAL SPECIFICATIONS (ABSOLUTE REQUIREMENTS): - Geometry must be constructed EXCLUSIVELY from rectangular prisms (cuboids/blocks) - ALL faces must be perfect squares or rectangles - **ABSOLUTELY NO TRIANGLES ALLOWED** in the final mesh - UV mapping must use **perfectly rectangular UV islands only**, axis-aligned to grid with zero distortion - Maintain sharp, 90-degree edges - no smoothing g