🍌 Nano Banana Professional Painting Assistant

你好！我是Nano Banana专属绘画助理，能为你生成可直接复用的模型绘画指令、提供创意构思、技法教学与画面优化建议。无论你是新手还是专业画师，我都能按步骤陪你完成创作并提升出片质量。告诉我你的画面需求或上传作品，我们马上开始。

Reference prompt (can be copied directly into the Nano Banana model): Theme: Cyberpunk female bust portrait; Composition: rule-of-thirds biased to the right, shoulders slightly turned, gaze directed downwards and off-frame; Lighting: strong cool blue key light from upper-left + warm yellow fill light from the right to create a pronounced warm-cool contrast; Details: subtle mechanical cybernetic eye, skin with reflective circuit-like patterns, clothing made of mixed metal and synthetic fabrics; Color palette: cool blue as the main tone with orange-yellow accents; Surface quality: sharp highlights and metallic reflection details; Environment: blurred neon city background (bokeh); Rendering: high-detail, multi-directional lighting sampling, soft edge anti-aliasing; Resolution: 1024x1536; Example keyword parameters: --style cyberpunk --detail high --lighting dramatic --material metallic,sheen --bokeh yes. Would you like me to refine the parameters into specific model temperature, sampling steps, and negative prompts?

Okay, first summarize the highlights and point out the issues: Highlights — the character pose has a sense of motion and the facial expression is well delivered; Issues — 1) Unbalanced perspective causing the right-side limb proportions to appear short; 2) Background elements are distributed too evenly, so the image lacks a focal point; 3) Colors are too gray, resulting in insufficient contrast. Correction steps: 1. Perspective correction (10–15 minutes): redraw the construction lines using a horizon line and vanishing points, lengthen the upper and lower right arm segments to match proper proportions, and calibrate arm length using head-units as reference. 2. Composition adjustment (5–10 minutes): move a dominant element (light source or prop) toward a rule-of-thirds point, and use foreground blur or vignetting to guide the viewer's eye. 3. Color and lighting (20–30 minutes): establish a three-tier color scheme (primary, secondary, accent), increase local contrast (boost highlights on the face and hand), and add semi-transparent glow where the warm-cool contrast is intended. 4. Details and materials (30+ minutes): treat skin, metal, and fabric with different brushes and high-frequency detail layers. I can generate a specific revision checklist, a reference perspective sketch, and brush/parameter suggestions tailored to your art style. Would you like the perspective sketch first or the color scheme?

Two-week light-and-shadow intensification plan (each practice 30–60 minutes): Days 1–3: Light source basics — understand single light source and shadow shapes; practice shading spheres and cubes (Goal: consistently render an 8-step grayscale). Days 4–6: Multiple light sources & warm-cool contrast — practice two-color lighting, learn rim light and secondary light effects (Goal: accurately represent objects under two light sources). Days 7–8: Material recognition and rendering — quick studies of metal, fabric, and skin with highlights (Goal: distinguish and render three material types convincingly). Days 9–10: Ambient light and atmospheric perspective — practice fog, light scattering, and color shifts (Goal: create depth and atmosphere). Days 11–12: Integrating lighting on figures — copy reference photos and re-render with different lighting setups (Goal: clear three-dimensionality of characters). Days 13–14: Final project and review — complete a small character piece with a specified lighting setup and write a review note (Goal: self-assess and create an improvement checklist). For each item I can provide reference images, PS/Procreate brush parameters, layered workflows, and checklists. Which tool would you like the specific brush parameters for?