This seamless 8K PBR 3D texture captures the intricate details of coal slag, showcasing a naturally rough and fissured surface characterized by a burnt umber coal color. Coal slag, an industrial byproduct composed primarily of mineral residues and fused organic carbon compounds, features a porous, dry substrate with coarse grains and dusty residue scattered across its surface. The burnt umber hue arises from iron oxide pigments and carbonized layers within the slag, lending the material its distinctive dark reddish-brown tone. This texture’s composition reflects the complex interplay of mineral aggregates, fine particulate binders, and weathered oxidation effects that create an authentic, tactile surface ideal for realistic 3D coal surfaces.
In PBR channels, these material traits translate into precise texture maps: the BaseColor (Albedo) channel reveals the rich burnt umber coal color with subtle variations and dusty grain patterns, while the Normal map enhances the fissured, uneven relief typical of rough slag surfaces. The Roughness map emphasizes the dry, coarse finish with varying degrees of matte and slightly reflective patches, simulating the natural wear and residue accumulation. Metallic values remain minimal, as coal slag is predominantly non-metallic, but Ambient Occlusion adds depth to crevices and pores, enhancing realism. The Height (Displacement) map captures the layered, cracked structure, allowing for convincing parallax effects in real-time engines.
Rendered at an ultra-high 8K resolution, this 3D texture is optimized for seamless tiling and is fully compatible with Blender, Unreal Engine, and Unity workflows. Its high fidelity ensures that even close-up views retain detail and natural variation, making it perfect for photorealistic coal slag surfaces in industrial, environmental, or geological visualizations. For best results, adjusting the UV scale to a moderate level preserves the fine grain structure without repetition, and fine-tuning roughness values can help achieve the perfect balance between dusty matte areas and subtle sheen where residue collects. Height map displacement can be leveraged to enhance the fissured depth for more pronounced surface realism in real-time rendering scenarios.
How to Use These Seamless PBR Textures in Blender
This guide shows how to connect a full PBR texture set to Principled BSDF in Blender (Cycles or Eevee). Works with any of our seamless textures free download, including PBR PNG materials for Blender / Unreal / Unity.
What’s inside the download
*_albedo.png — Base Color (sRGB)*_normal.png — Normal map (Non-Color)*_roughness.png — Roughness (Non-Color)*_metallic.png — Metallic (Non-Color)*_ao.png — Ambient Occlusion (Non-Color)*_height.png — Height / Displacement (Non-Color)*_ORM.png — Packed map (R=AO, G=Roughness, B=Metallic, Non-Color)
Quick start (Node Wrangler, 30 seconds)
- Enable the addon: Edit → Preferences → Add-ons → Node Wrangler.
- Create a material and select the Principled BSDF node.
- Press Ctrl + Shift + T and select the maps
albedo, normal, roughness, metallic (skip height and ORM for now) → Open.
The addon wires Base Color, Normal (with a Normal Map node), Roughness, and Metallic automatically.
- Add AO and Height using the “Manual wiring” steps below (5 and 6).
Manual wiring (full control)
- Create a material (Material Properties → New) and open the Shader Editor.
- Add an Image Texture node for each map. Set Color Space:
- Albedo → sRGB
- AO, Roughness, Metallic, Normal, Height, ORM → Non-Color
- Connect to Principled BSDF:
albedo → Base Colorroughness → Roughnessmetallic → Metallic (for wood this often stays near 0)normal → Normal Map node (Type: Tangent Space) → Normal of Principled.
If details look “inverted”, enable Invert Y on the Normal Map node.
- Ambient Occlusion (AO):
- Add a MixRGB (or Mix Color) node in mode Multiply.
- Input A =
albedo, Input B = ao, Factor = 1.0.
- Output of Mix → Base Color of Principled (replaces the direct albedo connection).
- Height / Displacement:
Cycles — true displacement
- Material Properties → Settings → Displacement: Displacement and Bump.
- Add a Displacement node: connect
height → Height, set Midlevel = 0.5, Scale = 0.02–0.08 (tune to taste).
- Output of Displacement → Material Output → Displacement.
- Add geometry density (e.g., Subdivision Surface) so displacement has polygons to work with.
Eevee (or lightweight Cycles) — bump only
- Add a Bump node:
height → Height.
- Set Strength = 0.2–0.5, Distance = 0.05–0.1, and connect Normal output to Principled’s Normal.
Using the packed ORM texture (optional)
Instead of separate AO/Roughness/Metallic maps you can use the single *_ORM.png:
- Add one Image Texture (Non-Color) → Separate RGB (or Separate Color).
- R (red) → AO (use it in the Multiply node with albedo as above).
- G (green) → Roughness of Principled.
- B (blue) → Metallic of Principled.
UVs & seamless tiling
- These textures are seamless. If your mesh has no UVs, go to UV Editing → Smart UV Project.
- For scale/repeat, add Texture Coordinate (UV) → Mapping and plug it into all texture nodes.
Increase Mapping → Scale (e.g., 2/2/2) to tile more densely.
Recommended starter values
- Normal Map Strength: 0.5–1.0
- Bump Strength: ~0.3
- Displacement Scale (Cycles): ~0.03
Common pitfalls
- Wrong Color Space (normals/roughness/etc. must be Non-Color).
- “Inverted” details → enable Invert Y on the Normal Map node.
- Over-strong relief → lower Displacement Scale or Bump Strength.
Example: Download Wood Textures and instantly apply parquet or rustic planks inside Blender for architectural visualization.
To add the downloaded texture, go to Add — Texture — Image Texture.
Add a node and click the Open button.
Select the required texture on your hard drive and connect Color to Base Color.
