blender 04
DESCRIPTION
BlenderTRANSCRIPT
BlenderShading & Lighting
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Blender Shading & Lighting
• Go to the tutorial at• http://cgcookie.com/blender/lessons/5-shading-and-lighting/
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Find out more at: http://www.blender.org/manual/render/cycles/lamps.html
Note: The Node editor behavior is slightly changed in newer versions of Blender
and… http://www.blender.org/manual/render/cycles/nodes/index.html
1st Tutorial Key Points
• Using the Cycles Renderer in the 3D view window
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Select the Render Engine
The Render Properties is specific for each render engine
1st Tutorial Key Points
• Using the Cycles Renderer in the 3D view window
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Viewport shading
Default is: “Solid”
Z key switches to “Solid” / “Wireframe”
1st Tutorial Key Points
• Create and Adjust basic Lamps
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Use the “Add” tab in the toolbox Use the “Shift-A” shortcut
1st Tutorial Key Points
• Create and Adjust basic Lamps
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Emits light to all directions from a point
Emits light in a single-direction (parallel rays)The position (XYZ) of the light is irrelevant
Emits light in a cone (like a spot light)
Not supported in Cycles Render Engine
Emits light from a square or rectangular area
1st Tutorial Key Points
• Create and Adjust basic Lamps
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Light Parameters
Strength
Color
Cast Shadow
If we select the Sun lamp…
1st Tutorial Key Points
• Create and Adjust basic Materials
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Material Parameters
Add New Material
If we select another object…
1st Tutorial Key Points
• Create and Adjust basic Materials
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Material Name
Material Slots
Preview Window
Tip: collapse if not in use to save memory / processor usage
1st Tutorial Key Points
• Create and Adjust basic Materials
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Change the surface type to simulate different materials like glass, velvet, translucent, gloss and so on…
Color of the surface
Change “glossiness”, etc…
1st Tutorial Key Points
• Create and Adjust basic Materials
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The “Glossy BSDF” has a new default distribution: “GGX” so the Roughness parameter value is slightly different from the tutorial.(or you can select the original Beckmann)
Select the “Glossy BSDF”
Adjust the Color & Roughness
1st Tutorial Key Points
• The Node Editor
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Click on the hatch area and drag down to create a new
window
1st Tutorial Key Points
• The Node Editor
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Now select the new window type
1st Tutorial Key Points
• The Node Editor
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The final material output
The “Glossy BSDF” node
BSDF:Bidirectional ScatteringDistribution Function
1st Tutorial Key Points
• The Node Editor
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Add a new “Difuse BDSF” shader.
Use the menu, or press Shift-A
Position the new node with the mouse, below the existing “Glossy BDSF”.
Note: you may need to zoom out to see the new node
1st Tutorial Key Points
• The Node Editor
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Click and drag to create connections
Note: in newer versions of the Node editor, if a connection already exists to the new connector, then the old connection is simply removed if there is no significant alternative (and not assigned to any connector like in previous versions).
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1st Tutorial Key Points
• The Node Editor
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Note: to remove a connection, drag one endpoint away from the connector
1st Tutorial Key Points• The Node Editor
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Use the “Mix Shader”
1st Tutorial Key Points• The Node Editor
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Use the “Checker Texture”
1st Tutorial Key Points
• The Node Editor
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The connector colors
Shader
Color
Number
Vector
1st Tutorial Key Points• The Node Editor
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Adjust parameters
100% Black
Light Blue
1st Tutorial Key Points
• The Node Editor
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Create a new material
Use Nodes
Cube
1st Tutorial Key Points• The Node Editor
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Delete a node
1. Click to select the “Difuse BSDF” node
2. Press “X” or “Delete”
1st Tutorial Key Points• The Node Editor
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Add “Glass BDSF” nodeand connect it.
1st Tutorial Key Points
• That’s it for the first tutorial
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Blender Shading & Lighting
• Go to the tutorial at• http://www.blenderguru.com/videos/the-secrets-of-realistic-texturing/
For this tutorial you can use the (very) low-resolution version of the texture:
http://www.cgtextures.com/thumbnails/textures/Floors/Streets/FloorStreets0072_1_preview.jpg
Or the alternative file available at Moodle (see next slide)
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Tip: don’t forget to use the Cycles Renderer in this tutorial!
Blender Shading & Lighting
Alternative file available at Moodle.
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https://moodle.isep.ipp.pt/mod/resource/view.php?id=24850
Blender Shading & Lighting
The tutorial is based on the (paid) CrazyBump software available for Windows and Mac.
http://www.crazybump.com/
But there are alternatives:
One is the Free and Open Source AwesomeBump that relies on GPU processing, available for Windows, Mac and Linux:
https://github.com/kmkolasinski/AwesomeBump
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2nd Tutorial Key Points
• Basic Texture: Color Map / Diffuse Map
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Looks like printed and glued to a wall.
Wrong reflections Wrong shadows
2nd Tutorial Key Points
• Basic Texture: Color Map / Diffuse Map
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2nd Tutorial Key Points
• Nice Textures: combine 5 maps
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NormalSpecularityOcclusionDisplacementDifuse
Crazy Bump can create these maps for you
2nd Tutorial Key Points
• Normal Map
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2nd Tutorial Key Points
• Displacement Modifier
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Strength: 0.100
Strength: 0.015
In newer versions of Blender the default is Image Texture for the Displacement Modifier
2nd Tutorial Key Points
• Specular / Glossy
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Mix Factor: 0.50
Mix Factor: 0.98
2nd Tutorial Key Points
• Occlusion
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Mult Factor: 0
Mult Factor: 1
Things to check out
• Make a “frosty” cube
• Try the other procedural textures & import other images, eg:• http://craziwolf.deviantart.com/art/16Free-Premium-Seamless-
Ground-Textures-1024X1024-300739637
• http://www.creattor.com/texturespatterns/various-digital-tileable-textures-2670
• Try out the other Lamps, including correct position/direction and other parameters (e.g. Size for the Spot lamp)
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Remember: the “Hemi” lamp it’s not supported in Cycles Render
Basic Checklist
• Using the Cycles Renderer in the 3D view window
• Create and Adjust basic Lamps
• Create and Adjust basic Materials
• Using Node Editor for materials & lamps
• Using multiple image files to create a realistic texture
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Extended Checklist
• Explore advanced materials and lamps features
• Texture Mapping
• Volumetric Lighting
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