How to Block In Shading & Skin Tones in Your Acrylic

/ Blocking-In Glazing Real Time Tutorial Video Tutorial
/ By Matt Philleo

How to add depth and dimension to your portrait with layering

Acrylic portrait painting requires understanding shading, value, and skin tone to capture the subject’s essence. In this post, you’ll learn how to block in shading and skin tones using acrylic glazing techniques, without losing detail or vibrancy.

Creating realistic skin tones and shading is a crucial aspect of acrylic portrait painting. This technique, known as blocking in, helps you define mid-tones and shadows early on, setting the stage for a vibrant and lifelike portrait. Using acrylic glazing, this process ensures a smooth transition from sketch to finished painting, retaining the likeness while building depth and luminosity. In this tutorial, we will break down how to block in shading and skin tones, offering a step-by-step guide to enhance your portrait’s realism.

Understanding the Glazing Technique

Acrylic glazing involves applying thin layers of translucent paint over a base to create depth and smooth transitions. Because combining paint with matte medium, you can control the transparency, allowing the underpainting to shine through. Then this method is ideal for building subtle layers of skin tones without overpowering the original sketch.

Tip: Start with light glazes and build up gradually. Also, use more medium for lighter glazes and increase pigment for darker tones.

Preparing Your Materials

Before diving into shading, gather the following materials:

Acrylic paints: Raw sienna, pyrrole orange, matte medium
Brushes: Soft, round brushes for detailed application
Matte Medium: Thins the paint and creates a translucent effect
Palette: To mix your glazes

Tip: Matte medium works best for glazing because it dries flat, ensuring you maintain control over the values. Avoid gloss mediums, as they can create distracting reflections while working.

Step 1: Begin with a Detailed Sketch

Start by ensuring your portrait sketch is clear and precise. The sketch provides the foundation for your shading and color work. Because it focus on the key areas where light and shadow fall, as these will guide your shading process.

Tip: Preserve the luminosity by keeping the lighter areas, such as the forehead, untouched during initial layers. This helps maintain brightness in the final result.

Step 2: Apply the First Glaze

Mix raw sienna with matte medium to create your first glaze. Raw sienna is an excellent base color for skin tones, providing a natural warmth that can be built upon. Apply this glaze lightly across the mid-tones of the face, avoiding the highlights.

Technique Insight: When, glazing allows you to enhance skin tones subtly without covering the entire surface. And then translucent layers let you build up depth without losing the detailed sketch beneath.

Step 3: Focus on Value, Not Just Color

While color is important, value—the lightness or darkness of an area—is even more crucial. Focus on building form by shading the areas that need more depth, like the sides of the face, beneath the chin, and around the nose.

Tip: “Value over color” is a fundamental principle. A black-and-white portrait can still be striking if the values are correct. Don’t rush to perfect the skin tone without ensuring the shadows and highlights are accurate.

Step 4: Building Skin Tones

Basically to enhance your raw sienna base, introduce subtle variations using pyrrole orange. While this color adds a red-orange tint to areas like the cheeks and nose, creating a more natural skin tone. Mix the pyro orange with matte medium to maintain translucency, then applying it in thin layers over the previous glazes.

Technique Insight: For fairer skin, keep the glazes light and gradually build up warmth with minimal layers. For darker or tanned skin tones, you can deepen the shading by increasing the pigment concentration in each glaze.

Step 5: Blending and Refining

As you continue applying glazes, you’ll notice how the layers blend smoothly, creating a gradual transition between light and shadow. Use a soft brush to gently feather the edges of your glazes, ensuring there are no harsh lines between transitions.

Tip: If any areas become too dark, you can lighten them by adding a glaze of matte medium mixed with titanium white. This will soften the area without disrupting the overall value structure.

Step 6: Maintain Light in Highlights

When blocking in shading, it’s essential to preserve the lighter areas, like the forehead and the top of the nose. You can always adjust these areas with subtle glazes later, but maintaining their brightness early on ensures that your portrait remains balanced in terms of light and form.

Tip: Always work in stages, letting each glaze dry before adding another. This allows you to assess the overall effect and make adjustments as necessary.

Step 7: Finishing Touches

Once you have built up your skin tones and shading, you can start adding more opaque layers in areas that need stronger definition. Reduce the amount of matte medium for these layers, focusing on darker shadows and adding detail to features like the eyes, lips, and nose.

Tip: Use smaller brushes for detailing in these final stages, paying attention to the subtle shifts in color and value across the face.

Building a Realistic Portrait

Blocking in shading and skin tones using acrylic glazing takes practice, but the results can be incredibly rewarding. By focusing on value, applying translucent layers, and preserving luminosity, you can create a portrait that has depth, realism, and vibrancy.

Final Tip: Remember, the glazing technique is all about patience. Build up your layers gradually, allowing each one to contribute to the final result.

Read more about my additional resources, tutorials, to learn more and check out my free courses here. . Whether you’re a beginner or an experienced artist, there’s always something new to learn and apply to your paintings. Happy painting!

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Thank you so much for taking the time to read this tutorial and watch the video. That means a lot to me. I hope you find it very helpful in your portrait painting.

Yours for Better Portraits,

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