Sign In
Sign in


June 4, 2012 8:00 AM


By Daniel RadialRonnie Metien

Basic Cycles Cavity shader tutorial.


This walk-through is thorough and detailed in its explanation and only assumes only basic knowledge of interface manipulation. 


Firstly you need to insure that your mesh is high-poly enough because we will be using Vertex Colors. The monkey mesh shown about is NOT high-poly enough and will show streaking in the final result if not subdivided.

Add a sub-div modifier and apply it if you think it's needed.


Hop on over to the Vertex Painting mode.


In the Paint menu in the footer, select "Dirt Vertex Colors."


This is the result of the bake with the default settings:


Directly after giving the AO bake command, press F6 to open the settings for this command;


Enter a smaller value for the Highlight Angle field to make the exposed areas stay white, and the cavities become darker.


This makes the overall result too bright, so you need to repeat these steps several times (I had to do it ~5 times)
[edit] To clarify, you need to rebake, and change that setting for each time to repeat the process. Simply pressing F6 several times won't change anything.
Keep in mind that once we are finished with this shader, Pure White will only be our one shader while Pure Black will be only the secondary shader.

This looks much better:


Now for the fun Part:
Add a new material, and change the surface type of Mix Shader:


Change the two mixed shaders to Glossy and Diffuse (in that order)


Now split a new node window making sure that you are seeing material nodes.


Change the shader colors to suit your needs. Here I set the Base glossy color to a brassy color, and the cavity shader to a bronze patina color (with exaggerated saturation).


Add a new attribute node:


Quickly pop open the Object Data tab:


Copy the Vertex Color name.


Paste the copied vCol name into the attribute node:


Plug in a a color invert node:


This is what everything should now look like. Notice the attribute's output is plugged into the Col value of the invert. By default it'll go into the Factor value which is something totally different.


Upon render, your shader could look something like this:




There several things you could do differently. For example, you might have used different settings at the AO bake stage. You might have tweaked the baked vertex colors manually with the paint brush getting 'custom' results.

The shader is as basic as you can get it. You could modify this to your heart's content to get exactly the results you want.

Check out the .Blend file if you have trouble following the tutorial:
.blend (130kb)

Related Links:





Views :
Registered Date :
21:46:03 (*.226.203.124)
Trackback :
Article URL :
List of Articles
Subject Date Views
Tutorials Free Online Blender Tutorials Released in 2016 Worthy of Your Note file Jan 16, 2017 39805
Tutorials Top 12 Free Online Blender Tutorials (Videos) Released in 2016 file Jan 16, 2017 39902
Blender Retrospectives 2016 Blender Retrospective file Dec 29, 2016 36588
Render of the Year Render of the Year Awards 2015: Seven Winners Annouced file Jan 20, 2016 92098
Blender Retrospectives 2015 Blender Retrospective file Jan 12, 2016 90806
Tutorials Top 12 Free Online Blender Tutorials Released in 2015 file Jun 26, 2015 91510
Tutorials Free Online Blender Tutorials Released in 2015 Worthy of Your Note file Jun 26, 2015 91168
Render of the Year Render of the Year Awards 2014: Five Winners Annouced file Jan 02, 2015 127472
Tutorials Top 12 Free Online Blender Tutorials Released in 2014 file Dec 11, 2014 125845
Tutorials Free Online Blender Tutorials Released in 2014 Worthy of Your Note file Dec 09, 2014 147729
Render of the Week 'Green Woods' by Jason Reynolds - Winner for the Week of July 23, 2012 file Jul 23, 2012 20599
Blender Features BI vs. Yafaray vs. Cycles - in Outdoor Arch Viz file Jul 02, 2012 38316
Render of the Week 'Mischief in the Subway' by Richard Hoatland - Winner of the Week of July 16, 2012 file Jul 16, 2012 33263
Tutorials Top 5 Sources for Advanced Blender Tutorials file Apr 16, 2012 21948
Production Focus REVERSION: A Testing Ground for 'Cell Production' file Jul 10, 2012 18731
Blender Features Food and Blender - a Veteran's Observation file Jul 10, 2012 17996
Render of the Week 'Come Hell or High Water' by Julian Fischer - Winner of the Week of July 9, 2012 file Jul 09, 2012 26206
Blender Features Food and Blender - the Possibilities file Jul 02, 2012 21539
Render of the Week 'The Doppelganger' by Eric Basiletti - Winner of the Week of July 2, 2012 file Jul 02, 2012 20760
Production Focus PRODUCTION FOCUS: REVERSION file Jun 25, 2012 24353
Product Visualization PRODUCT VISUALIZATION IN BLENDER for the week of June 25, 2012 file Jun 25, 2012 23973
Render of the Week 'Gargoyle' by Michalis Zissiou - Winner of the Week of June 18, 2012 file Jun 18, 2012 23275
Industry News Blender Whiz ... file Jun 19, 2012 15282
Blender Features BI vs. Cycles vs. Yafaray - an Artist's Observation file Jun 05, 2012 213178
Production Focus PRODUCT VISUALIZATIONS IN BLENDER file Jun 11, 2012 19277
Render of the Week 'Urban Apartment' by Enrico Cerica - Winner of the Week of June 11, 2012 file Jun 11, 2012 26854
Tutorials How to Add Automatic Dirt / Patina - Daniel RadialRonnie Metien's Way file Jun 04, 2012 83740
Render of the Week 'Pripyat, 1987' by Anuraag - the Winner of the Week of June 4, 2002 file Jun 04, 2012 24349
Tutorials 'Subsurface Scattering' in Cycles Revealed file May 21, 2012 32282
Render of the Week 'Minotaurus' by Tamas Torok - the Winner of the Week of May 28, 2002 file May 28, 2012 24600

(C) 2012. All rights reserved.