# Atelier Masterclass — Complete Product & Technical Specification

## Overview
Atelier Masterclass (https://www.ateliermasterclass.art) is an AI studio assistant, physical colour mixing solver, and inventory management suite engineered specifically for classical and contemporary fine art painters (oil, watercolour, acrylic, gouache, and mixed media).

## Modules & Workspaces

### Module 1: Colour Mixing Lab & Kubelka-Munk Solver
- Core Engine: ColourEngine v2.2 (Physical Two-Constant Kubelka-Munk Pigment Physics).
- Mathematical Basis: Solves for pigment concentration vectors $C = [c_1, c_2, \dots, c_k]$ minimizing CIE $\Delta E_{00}$ against target CIELAB coordinates $(L^*, a^*, b^*)$ under Standard Illuminant D65:
  $$\left(\frac{K}{S}\right)_{\text{mix}} = \frac{\sum c_i K_i}{\sum c_i S_i}$$
- Features:
  - Exact percentage paint recipes for user inventory (e.g. "62% French Ultramarine + 28% Cadmium Yellow + 10% Titanium White").
  - Physical pigment database with true optical constants (PB29, PY35, PR108, PG7, PBr7, PBk9, PW6, PW4, etc.).
  - Interactive HSL Colour Wheel, Hue Picker, and Eyedropper matching tool.
  - Multi-pigment complexity regularization preventing unnecessary multi-tube muddying.

### Module 2: Studio Inventory & Smart Supplier Reorder System
- Inventory Categories:
  - Paints & Pigments (Brand, Medium, Tube Size, Unit Count, % Fill, Opacity, Pigment Index)
  - Brushes (Brand, Hair Type: Hog/Sable/Synthetic, Shape: Filbert/Flat/Round/Mop, Size, Condition Rating)
  - Mediums & Solvents (Oils, Liquin, Turpenoid, Gamsol, Retarders, Varnish)
  - Surfaces (Stretched Canvas, Linen, Wood Panels, Paper, Board, Stock Quantity, Dimensions)
  - Drawing Materials (Graphite, Vine/Compressed Charcoal, Pastels, Sanguine, Conte)
  - Studio Tools (Palette Knives, Mahl Sticks, Brush Washers, Easel Accessories)
- Reorder Intelligence:
  - Simple vs. Consumption-Aware Modes.
  - Dynamic formula incorporating daily consumption rate and supplier transit lead times:
    $$\text{Reorder Point} = \text{Minimum Threshold} + (\text{Daily Usage Rate} \times \text{Lead Time Days})$$
  - User-configurable low-stock triggers ($\le 1, 2, 3, 4, 5$ tubes or $\le 10\%, 20\%, 30\%, 50\%$ open fill).
  - Dynamic grouping in Shopping List UI and PDF print export by Supplier, Category, Urgency, or Brand.

### Module 3: Atelier Mentor & Reference Studio
- Multimodal Vision AI: Analyzes uploaded painting reference photographs and in-progress canvas photos.
- Tonal Value Breakdown: Converts reference imagery into Notan, 3-value, 5-value, and 9-value grayscale value maps.
- Classical Grid Overlays: Rule of Thirds, Golden Mean, Armature of the Rectangle, Perspective Horizon Lines.
- Step-by-Step Personalized Painting Plans: Imprimatura, Underdrawing/Transfer, Ebauche/Underpainting, Glazing, Scumbling, and Alla Prima Final Highlights.
- Room Visualiser: High-fidelity virtual framing and wall simulation to preview artwork dimensions in galleries, living rooms, and studio exhibitions.

### Module 4: Multi-Cloud Studio Vault
- Dual Cloud Backup: Google Drive (OAuth) & Apple iCloud Drive (`com.apple.CloudDocs`).
- Auto-sync for reference folders, color mixing palettes, dossiers, and studio notebooks.

## Pricing & Subscription Tiers
- Atelier Pro Monthly: €9.99 / month (Includes 400 monthly Studio AI Credits).
- Atelier Pro Annual: €99.00 / year (Saves €20.88 / 2 months free; includes 400 monthly credits + expanded cloud storage).
- Credit Top-ups:
  - 100 Credits: €4.99
  - 300 Credits: €11.99
  - 700 Credits: €24.99

## Target Keywords for Search & Discovery
fine art studio assistant, oil paint mixing app, kubelka munk paint mixer, watercolour palette generator, atelier mentor ai, traditional painting assistant, artist stock inventory, art supply lead time reorder, notan value study tool, classical art composition grid, room visualiser for artists, winsor and newton paint mixer, michael harding paint recipes, plein air color solver, bargue drawing analysis.