Part of Cinema 4D Essentials
Bump
7 September 2022
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Bump and normal maps are essential for adding surface details—like scratches, grooves, or embossed patterns—without increasing mesh complexity. They manipulate surface normals to simulate depth, while geometry remains unchanged, preserving rendering performance.
What You Need to Know
- Bump mapping uses grayscale height maps to perturb surface normals.
- Normal mapping uses RGB textures—either object-space or tangent-space—to define precise normal directions per pixel.
- These techniques simulate lighting detail but do not alter shadows or silhouette.
Step-by-Step Workflow
- Create or load a Redshift material and apply it to your object.
- In the Material Editor, connect a Bump Map node to the Bump Input of the Redshift Material.
- Inside the Bump Map node, select the Map Type:
- Height Field for grayscale bump maps
- Object-Space Normal or Tangent-Space Normal for normal maps
- Set Height Scale (default ≈ 0.01). Larger values deepen bump effect; extreme values may look fake.
- If using normal maps from DirectX, enable Flip Normal Y to correct orientation.
Mixing Multiple Bump Maps
Use the Bump Blender shader to layer multiple bump or normal maps with control over blending modes:
- Adjustable blend weights per layer
- Additive mode for stacking effects
Using Procedural Noise
Redshift’s Maxon Noise node can drive bump input—great for procedural surface detail:
- Use Cinema 4D procedural noise in object/world space
- No need to bake to texture
- Useful for organic variation or subtle irregularities
Tricks for Smooth and Realistic Results
- Use high-resolution (16-bit/32-bit) maps for gentle gradients; this reduces banding and enhances smoothness Cineversity Forums.
- Set correct map Gamma and Color Space (raw/linear, gamma 1.0) to avoid shading artifacts help.maxon.net+1C3D+1.
- When combining bump nodes (e.g., Round Corners + procedural noise), use Bump Blender for consistent normal output YouTube+4help.maxon.net+4help.maxon.net+4.
When to Use vs. Displacement
- Bump/normal mapping only alters shading normals; silhouettes remain unchanged—ideal for subtle texture details.
- Displacement physically modifies geometry—use for strong surface shifts, displacement edges, or silhouette variations.
Quick Reference Table
| Parameter | Description |
|---|---|
| Map Type | Height-field or normal (object/tangent space) |
| Height Scale | Controls bump depth; values too high may look unrealistic |
| Flip Normal Y | Corrects DirectX-to-OpenGL normal orientation |
| Bump Blender | Layer and blend multiple bump inputs |
| Maxon Noise | Procedural variation via native noise node |
Summary
Redshift’s bump and normal mapping workflow in Cinema 4D 2025 includes:
- Connecting bump or normal textures to the Material's bump input
- Choosing appropriate map type and correct color settings
- Blending multiple maps via Bump Blender
- Optionally driving bumps with procedural noise
- Knowing when to supplement with or switch to displacement for full geometry deformation
These techniques let you add realistic surface detail efficiently—without adding geometry—enhancing close-up renders and photoreal projects.
Video Credit: Greyscalegorilla.
Description: This video demonstrates how to add bump maps in Redshift for Cinema 4D.
