Blender Glass-like Shader without Distortion

When working on the Snowman Crystal Ball illustration, I originally had trouble getting the look right when using the built-in Blender “Glass BSDF” Shader. Either the reflections on the surface were too harsh or the Snowman blurred out too much or got distorted way too much.

The Solution: Fake Glass Shader

Instead of using the standard Glass BSDF, this technique combines Transparent BSDF with Glossy BSDF and a custom Fresnel node to create glass-like reflections without refraction distortion.

Node Setup

1. Create the Material

1. Select your object (e.g., crystal ball sphere)
2. Go to the Shader Editor
3. Create a new material with Principled BSDF or mix nodes

2. Mix Transparent and Glossy BSDF

Transparent BSDF ─┐
                 ├→ Mix Shader → Material Output
Glossy BSDF ─────┘

Node Configuration:

• Transparent BSDF:

  • Factor: 1.0 (fully transparent)

• Glossy BSDF:

  • Roughness: 0.1 (slightly blurred reflections)
  • Color: White or very light gray

• Mix Shader:

  • Factor: Controlled by Fresnel node

3. Add Fresnel for Edge Reflections

Fresnel → Mix Shader (Factor input)

Node Configuration:

• Fresnel:
  • IOR: 1.45 (glass-like reflectivity at angles)

This creates stronger reflections at glancing angles while keeping the center more transparent.

4. Optional: Add Subsurface Scattering

For a more realistic crystal ball effect, add subsurface scattering:

Subsurface Scattering → Mix Shader (second input)

Node Configuration:

• Subsurface Scattering:
  • Radius: 0.1 (subtle glow)
  • Color: Light blue or white
  • Strength: 0.3

Final Node Tree Structure

[Fresnel] → [Mix Shader] (Factor)
[Transparent BSDF] ─┐
                    ├→ [Mix Shader] → [Material Output]
[Glossy BSDF] ──────┘
[Subsurface Scattering] ──→ [Second Mix Shader] (optional)

Why This Works Better Than Glass BSDF

Tips for Game Engines

When exporting this shader to Unity or Unreal:

Unity (URP/HDRP)

1. Use a custom Shader Graph with:

   • Transparent render queue
   • Glossy reflections via Screen Space Reflections
   • No refraction pass

2. Or use the Standard Asset transparent shader as a base

Unreal Engine

1. Create a material with:
   • Translucency set to “Yes”
   • Refraction disabled
   • Screen Space Reflections enabled for glossy highlights

Related Resources

• Easy Water Shader in Blender 4.0 – Similar shader techniques
• Best Blender to Unity Export Settings – Optimize your workflow
• Low-Poly Forest Environment – Complete scene with glass effects

Have questions about this technique? Check out our other Blender tutorials or leave a comment below! ✨🔮