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| gamedev:textureproperties:roughness [2012/12/03 23:36] – dragonlord | gamedev:textureproperties:roughness [2019/05/24 23:43] (current) – ↷ Links adapted because of a move operation dragonlord |
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| | {{tag>graphic skin texture roughness}} |
| <WRAP youarehere> | <WRAP youarehere> |
| [[:start|Start Page]] >> [[gamedev:main|Game Development with the Drag[en]gine]] >> [[gamedev:skinproperties|Skin Texture Properties]] >> [[gamedev:texturepropertylist|Texture Property Database]] >> **roughness** | [[:start|Start Page]] >> [[:gamedev|Game Development with the Drag[en]gine]] >> [[gamedev:skinproperties|Skin Texture Properties]] >> [[gamedev:texturepropertylist|Texture Property Database]] >> **roughness** |
| </WRAP> | </WRAP> |
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| <WRAP boxheader> | ====== Skin Texture Property: roughness ====== |
| ====== Summary ====== | |
| </WRAP> | Defines the roughness of a surface. |
| <WRAP boxcontent> | |
| |Texture Property Name|roughness| | |
| |Description|Defines the roughness of a surface| | |
| |Excepted Data Source|2 component image| | |Excepted Data Source|2 component image| |
| |Data Range|0 to 1 for all image components| | |Data Range|0 to 1 for all image components| |
| |Affected Modules|Graphic| | |Affected Modules|Graphic| |
| |Linked Properties|[[gamedev:textureproperties:roughness_remap_lower|roughness.remap.lower]], [[gamedev:textureproperties:roughness_remap_upper|roughness.remap.upper]]| | |Linked Properties|[[gamedev:textureproperties:roughness_remap_lower|roughness.remap.lower]], [[gamedev:textureproperties:roughness_remap_upper|roughness.remap.upper]]| |
| </WRAP> | |
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| ====== Description ====== | ====== Description ====== |
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| The **roughness** texture property defines the roughness of the surface. This property is one of the most important properties in the **[[gamedev:pbr|physically based rendering]]** approach. In other game engines specular reflection also includes the surface roughness together with the reflectivity which results in troubles working with such a combined value. The roughness on the other hand decouples the shape of the reflection from the intensity of the reflection. The **[[gamedev:textureproperties:reflectivity|reflectivity]]** texture property determines in general the **intensity of reflections** while this texture property determines the **shape of the reflection**. Two pices of plastic for example have the same **[[gamedev:textureproperties:reflectivity|reflectivity]]**. One of them is though rather smooth with a low roughness value while the other is rather dull with a higher roughness value. The appearance of the plastic is totally different. The different roughness value alters the shape, intensity and bluriness of the reflection on the plastic material. To get a good looking material good values for this texture property are important. | The **roughness** texture property defines the roughness of the surface. This property is one of the most important properties in the **[[gamedev:pbr|physically based rendering]]** approach. In other game engines specular reflection also includes the surface roughness together with the reflectivity which results in troubles working with such a combined value. The roughness on the other hand decouples the shape of the reflection from the intensity of the reflection. The **[[gamedev:textureproperties:reflectivity|reflectivity]]** texture property determines in general the **intensity of reflections** while this texture property determines the **shape of the reflection**. Two pices of plastic for example have the same **[[gamedev:textureproperties:reflectivity|reflectivity]]**. One of them is though rather smooth with a low roughness value while the other is rather dull with a higher roughness value. The appearance of the plastic is totally different. The different roughness value alters the shape, intensity and bluriness of the reflection on the plastic material. To get a good looking material good values for this texture property are important. |
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| ====== Examples ====== | ====== Examples ====== |
| ( TODO: example image ) | |
| | <WRAP center 100%> |
| | <WRAP center box 620px> |
| | {{ :gamedev:textureproperties:roughness.png |Materials with same reflectivity but different roughness}} |
| | <WRAP centeralign>Materials with same reflectivity but different roughness. Left image has a high roughness (rubber). Middle image has average roughness (rough plastic). Right image has very low roughness (polished plastic).</WRAP> |
| | </WRAP> |
| | </WRAP> |
