How to Paint Warhammer 40K Ultramarines: 4-Step Volumetric Highlighting with AI

Published on August 30, 2026 · By MiniPaint AI Workbench Team · 6 min read

Painting Space Marine power armor is a rite of passage for every miniature wargamer. While a standard basecoat and wash produces a tabletop-ready miniature, achieving crisp, eye-catching volumetric contrast requires deliberate highlight progression and controlled water-to-pigment thinning.

The 4-Step Volumetric Formula

MiniPaint AI's color analysis engine decomposes award-winning Warhammer studio armor recipes into a structured 4-tier value chain:

Citadel Blue Power Armor Value Chain

Deep Shadow: Kantor Blue (Citadel Base) — Applied in under-panels, underside of greaves, and chest recess shadows. Thin 1:1 with water or acrylic medium.
Midtone Base: Macragge Blue (Citadel Base) — Smooth 2 thin coats across 70% of the armor surface where ambient light hits.
First Volumetric Layer: Altdorf Guard Blue (Citadel Layer) — Feathered outward toward upper armor edges, shoulders, and helmet brow. Thin 2:1 with medium.
Extreme Edge Highlight: Calgar Blue / Fenrisian Grey (Citadel Layer) — Razor-sharp edge highlight applied with the side of a #0 Kolinsky sable brush.

Desk Mode: Thinning and Glaze Guidance

When executing this recipe in MiniPaint AI's built-in Desk Mode HUD, the companion timer keeps you on track while showing step-specific thinning ratios:

Basecoats: Dilute to the consistency of whole milk. Two thin coats will preserve sharp edge details.
Glazing Layers: Dilute 3:1 with acrylic medium or glaze retarder. Unload excess moisture onto paper towel before touching the miniature.

Deconstruct Your Own Recipes with MiniPaint AI

Have a reference photo from Box Art or Golden Demon? Snap a photo in MiniPaint AI to instantly isolate Armor, Cloak, and Weapon color zones with CIELAB paint matches from Citadel, Vallejo, and Army Painter.

Try MiniPaint AI Free on iOS

Scan your miniatures and match paints on your shelf instantly.

Download on App Store