Sign In
Sign in
English

TopBanners120604.jpg



June 4, 2012 8:00 AM

 

By Daniel RadialRonnie Metien


Basic Cycles Cavity shader tutorial.


weo8Z.png

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

ZWjwM.png

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.

idXd1.png

Hop on over to the Vertex Painting mode.

2dXRG.png

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

xY6qv.png

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

8JKWE.png

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

jNBWM.png

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

3FhJz.png

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:

iVWNL.png

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

VUsFL.png

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

lqprJ.png

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

YkPIu.png

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).

DqkhA.png

Add a new attribute node:

LlEod.png

Quickly pop open the Object Data tab:

lpvKr.png

Copy the Vertex Color name.

0tWvS.png

Paste the copied vCol name into the attribute node:

hMWjP.png

Plug in a a color invert node:

hfi8v.png

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.

DWoih.png

Upon render, your shader could look something like this:

tUMjB.png

lp2tM.png

vBu33l.jpg

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:

1. http://blenderartists.org/forum/showthread.php?241389-Dirt-procedure&p=2036346&viewfull=1#post2036346

2. http://danielsarts.tumblr.com/

3. http://www.livelightstudios.com/

4. http://dan52t.deviantart.com/gallery/

Views :
119248
Registered Date :
2012.06.04
21:46:03 (*.226.203.124)
Trackback :
http://blendernews.org/xe/1262/d00/trackback
Article URL :
http://blendernews.org/xe/1262
List of Articles
Subject Date Views
Blender Retrospectives 2020 Blender Retrospective Feb 20, 2021 211002
Tutorials Free Online Blender Tutorials Released in 2019 Worthy of Your Note - for Animation & VFX file Jan 25, 2020 563109
Tutorials Free Online Blender Tutorials Released in 2019 Worthy of Your Note - for CG, Games & Viz file Jan 25, 2020 426212
Tutorials Top 12 Free Online Blender Tutorials Released in 2019 file Jan 25, 2020 431958
Tutorials Top 15 Highest-Rated Free Online Blender Tutorials Released in 2019 file Jan 25, 2020 375853
Tutorials Free Online Blender Tutorials Released in 2018 for Blender 2.8 file Jan 23, 2019 344981
Tutorials Free Online Blender Tutorials Released in 2018 Worthy of Your Note - for CG, Games & Viz file Jan 23, 2019 684283
Tutorials Free Online Blender Tutorials Released in 2018 Worthy of Your Note - for Animation & VFX file Jan 23, 2019 408372
Tutorials Top 12 Free Online Blender Tutorials Released in 2018 file Jan 23, 2019 344893
Render of the Year Render of the Year Awards 2018: Winners Annouced file Jan 02, 2019 381640
Blender Retrospectives 2018 Blender Retrospective file Jan 02, 2019 376038
Tutorials Top 12 Free Online Blender Tutorials Released in 2017 file Jan 09, 2018 968976
Blender Retrospectives 2017 Blender Retrospective file Jan 01, 2018 696756
Render of the Year Render of the Year Awards 2017: Winners Annouced file Dec 26, 2017 550721
Tutorials Top 12 Free Online Blender Tutorials (Videos) Released in 2016 file Jan 16, 2017 765389
Blender Retrospectives 2016 Blender Retrospective file Dec 29, 2016 1060279
Render of the Year Render of the Year Awards 2015: Seven Winners Annouced file Jan 20, 2016 790533
Blender Retrospectives 2015 Blender Retrospective file Jan 12, 2016 762257
Tutorials Top 12 Free Online Blender Tutorials Released in 2015 file Jun 26, 2015 805598
Render of the Year Render of the Year Awards 2014: Five Winners Annouced file Jan 02, 2015 813817
Tutorials Top 12 Free Online Blender Tutorials Released in 2014 file Dec 11, 2014 852691
Render of the Week 'Tyrannosaurus Rex Breakout' by Stephen Lund - the Winner of the Week of September 16, 2013 file Sep 16, 2013 40225
Architectural Visualization ARCHITECTURAL VISUALIZATION IN BLENDER for the week of September 9, 2013 file Sep 09, 2013 38390
Render of the Week 'Car Was ... ' by Enrico Cerica - the Winner of the Week of September 2, 2013 file Sep 02, 2013 38255
Product Visualization PRODUCT VISUALIZATION IN BLENDER for the week of Sept. 2, 2013 file Sep 02, 2013 37095
Render of the Week 'Concept Car' by Marco Beretta - the Winner of the Week of August 26, 2013 file Aug 27, 2013 37549
Architectural Visualization ARCHITECTURAL VISUALIZATION IN BLENDER for the week of August 26, 2013 file Aug 27, 2013 34637
Render of the Week 'Old Zombie' byPaulo Ricardo S. Ribeiro - the Winner of the Week of August 19, 2013 file Aug 20, 2013 56119
Product Visualization PRODUCT VISUALIZATION IN BLENDER for the week of August 19, 2013 file Aug 20, 2013 33283
Render of the Week ' The Day Our Creators Abandoned Us' by Christoph Becker - the Winner of the Week of August 12, 2013 file Aug 12, 2013 40575
Architectural Visualization ARCHITECTURAL VISUALIZATION IN BLENDER for the week of August 12, 2013 file Aug 12, 2013 34624
Render of the Week ' Princess' by Jakub Vondra - the Winner of the Week of August 5, 2013 file Aug 06, 2013 36250
Product Visualization PRODUCT VISUALIZATION IN BLENDER for the week of August 5, 2013 file Aug 06, 2013 33520
Render of the Week 'Blue Submarine n6' by Max Puliero - the Winner of the Week of July 28, 2013 file Jul 29, 2013 41338
Architectural Visualization ARCHITECTURAL VISUALIZATION IN BLENDER for the week of July 28, 2013 file Jul 29, 2013 36285
Blender Whiz The Artist Behind 'Battlecruiser:' Roberto Dailey file Jul 23, 2013 79268
Product Visualization PRODUCT VISUALIZATION IN BLENDER for the week of July 22, 2013 file Jul 23, 2013 33796
Render of the Week 'Dragonfly' by Julien Deville - the Winner of the Week of July 14, 2013 file Jul 15, 2013 36461
Architectural Visualization ARCHITECTURAL VISUALIZATION IN BLENDER for the week of July 15, 2013 file Jul 15, 2013 39935
Render of the Week 'Painter Loft' by Enrico Cerica - the Winner of the Week of July 8, 2013 file Jul 08, 2013 38530
Product Visualization PRODUCT VISUALIZATION IN BLENDER for the week of July 8, 2013 file Jul 08, 2013 34659