Goonhammer Tutorial Breaks Down Object-Source Lighting With Army Painter Speedpaints

Object-Source Lighting is one of those techniques that looks intimidating from the outside. You see it on competition tables and Golden Demon shelves: that eerie glow spilling from a torch, a glowing rune, or a plasma coil onto the surrounding surfaces. It's the kind of effect that makes a miniature look genuinely alive. The assumption is that you need years of blending experience and a palette full of custom mixes to pull it off. A tutorial from Goonhammer's keewa, developed in partnership with The Army Painter, pushes back hard on that idea by demonstrating OSL using the Speedpaint range, a product line built around accessibility and speed.

What OSL actually is, and why it trips people up

At its core, OSL is an illusion. You're not painting light itself; you're painting how light changes the surfaces around a source. A glowing green gem doesn't just sit on a model, it bleeds color onto nearby armor plates, fabric, and skin. The effect reads as convincing because our eyes are trained to expect it in the real world. The problem for painters is that OSL requires you to think in terms of color temperature and falloff, which is a fundamentally different mental model from standard highlight-and-shade work.

Most traditional approaches to OSL involve wet blending or glazing, techniques that demand either fast brush work before paint dries or careful layered washes thinned to near-transparency. Both methods have real learning curves. Speedpaints, with their self-leveling, flow-optimized formula, offer an alternative path. The pigment suspension in Army Painter's Speedpaint range is designed to settle into recesses while leaving raised surfaces slightly lighter, which maps directly onto what OSL demands: concentrated color near the source, fading out as distance increases.

Why Speedpaints suit this technique

The Speedpaint formula does something useful for OSL that standard paints don't do automatically. When you apply a Speedpaint over a light basecoat, the paint migrates toward recesses and thin pools, leaving a natural gradient on curved surfaces. That gradient behavior, the same property that makes Speedpaints fast for batch painting rank-and-file infantry, becomes a technical asset when you're trying to simulate light falloff on a chest plate or a gauntlet.

Keewa's tutorial leans into this property directly. Rather than fighting the paint's behavior, the approach is to use it deliberately: apply the Speedpaint color that matches your OSL source in the areas closest to the light, let the natural pooling create the falloff toward the edges, and use subsequent thin passes to reinforce the transition where needed. The result is a glow effect that doesn't require mastery of wet blending, which makes it genuinely accessible for painters at an intermediate level who want to push their models further without investing weeks in learning a new foundational skill.

The step-by-step approach

The tutorial keewa presents for Goonhammer is built as practical, sequential instruction rather than theory. The methodology follows a logical progression:

Working with the Speedpaint system specifically

One practical consideration the Goonhammer tutorial addresses is the product-specific behavior of Speedpaints under rework. Because Speedpaints can reactivate with moisture, layering over them requires some care. Letting each pass fully cure before adding the next is more important here than with standard acrylic layers. A varnish layer between stages, even a thin matte coat, gives you a stable surface to work on top of without disturbing what's underneath.

Color selection within the Speedpaint range also matters for OSL. Warmer, more saturated colors in the range, analogous to fire oranges, electric blues, or arcane greens, read more convincingly as light-emitting sources than muted tones. The tutorial framework from keewa works with whichever source color fits your model's narrative, but the principle is consistent: choose a Speedpaint that has strong chromatic punch, because the semi-transparent formula will naturally soften it during application.

Getting the most out of this approach

OSL done with Speedpaints won't look identical to competition-level blended OSL, and that's worth being honest about. What it will do is give your model a convincing, readable glow effect in a fraction of the time, with a forgiving medium that naturally assists the technique rather than working against it. For army painters trying to get their warbands and squads to tabletop-plus quality without painting each model for six hours, that tradeoff is a genuine win.

Keewa's tutorial for Goonhammer, backed by the Army Painter partnership, is a good reminder that advanced effects don't always require advanced methods. Matching the right tool to the right technique is half the battle, and Speedpaints, for all that they're marketed as a speed solution, have real depth when you understand what the formula is actually doing.