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 :
110195
Registered Date :
2012.06.04
21:46:03 (*.226.203.124)
Trackback :
http://blendernews.org/xe/1262/f6c/trackback
Article URL :
http://blendernews.org/xe/1262
List of Articles
Subject Datesort Views
Blender Retrospectives 2020 Blender Retrospective Feb 20, 2021 39587
Tutorials Free Online Blender Tutorials Released in 2019 Worthy of Your Note - for Animation & VFX file Jan 25, 2020 136596
Tutorials Free Online Blender Tutorials Released in 2019 Worthy of Your Note - for CG, Games & Viz file Jan 25, 2020 130416
Tutorials Top 12 Free Online Blender Tutorials Released in 2019 file Jan 25, 2020 139137
Tutorials Top 15 Highest-Rated Free Online Blender Tutorials Released in 2019 file Jan 25, 2020 131755
Tutorials Free Online Blender Tutorials Released in 2018 for Blender 2.8 file Jan 23, 2019 185083
Tutorials Free Online Blender Tutorials Released in 2018 Worthy of Your Note - for CG, Games & Viz file Jan 23, 2019 196586
Tutorials Free Online Blender Tutorials Released in 2018 Worthy of Your Note - for Animation & VFX file Jan 23, 2019 183335
Tutorials Top 12 Free Online Blender Tutorials Released in 2018 file Jan 23, 2019 181150
Render of the Year Render of the Year Awards 2018: Winners Annouced file Jan 02, 2019 192083
Blender Retrospectives 2018 Blender Retrospective file Jan 02, 2019 189705
Tutorials Top 12 Free Online Blender Tutorials Released in 2017 file Jan 09, 2018 386909
Blender Retrospectives 2017 Blender Retrospective file Jan 01, 2018 393755
Render of the Year Render of the Year Awards 2017: Winners Annouced file Dec 26, 2017 370800
Tutorials Top 12 Free Online Blender Tutorials (Videos) Released in 2016 file Jan 16, 2017 552449
Blender Retrospectives 2016 Blender Retrospective file Dec 29, 2016 616273
Render of the Year Render of the Year Awards 2015: Seven Winners Annouced file Jan 20, 2016 592232
Blender Retrospectives 2015 Blender Retrospective file Jan 12, 2016 573632
Tutorials Top 12 Free Online Blender Tutorials Released in 2015 file Jun 26, 2015 579248
Render of the Year Render of the Year Awards 2014: Five Winners Annouced file Jan 02, 2015 609395
Tutorials Top 12 Free Online Blender Tutorials Released in 2014 file Dec 11, 2014 643042
Blender Features Diamond Dispersion in Cycles Revealed file Apr 06, 2012 75729
Industry News www.BlenderNews.org launched file Apr 07, 2012 57323
Tutorials Best Tutorials for Trained Artists Starting Up with Blender? file Apr 16, 2012 37449
Tutorials Top 5 Sources for Advanced Blender Tutorials file Apr 16, 2012 40702
Render of the Week 'Loft in Cloister' by Enrico Cerica - the Winner of the Week of April 23, 2012 file Apr 23, 2012 55816
Blender Features Beware, BMesh Is Here! file Apr 24, 2012 36818
Render of the Week 'SSS Study' by Kent Trammell - the Winner of the Week of April 30, 2012 file Apr 30, 2012 59659
Tutorials Individual Video Tutorials Worthy of Your Attention: Daniel Kreuter file Apr 30, 2012 36270
Blender Releases Blender 2.63 Released! file Apr 30, 2012 28753
Render of the Week 'Remote Drone Spider' by Ben Milwood - the Winner of the Week of May 7, 2012 file May 07, 2012 54701
Tutorials 'Sculpting' the Tornado file May 07, 2012 39834
Render of the Week Bidirectional Interior with Yafaray - by Olivier Boscournu - the Winner of the Week of May 14, 2012 file May 14, 2012 71899
Blender Releases Blender 2.63a Update file May 14, 2012 28447
Render of the Week "Cryptocephalus" by Gabriel Tomczak - the Winner of the Week of May 21, 2012 file May 21, 2012 49916
Tutorials 'Subsurface Scattering' in Cycles Revealed file May 21, 2012 57851
Render of the Week 'Minotaurus' by Tamas Torok - the Winner of the Week of May 28, 2002 file May 28, 2012 52509
Render of the Week 'Pripyat, 1987' by Anuraag - the Winner of the Week of June 4, 2002 file Jun 04, 2012 50807
Tutorials How to Add Automatic Dirt / Patina - Daniel RadialRonnie Metien's Way file Jun 04, 2012 110195
Blender Features BI vs. Cycles vs. Yafaray - an Artist's Observation file Jun 05, 2012 550460
Render of the Week 'Urban Apartment' by Enrico Cerica - Winner of the Week of June 11, 2012 file Jun 11, 2012 52356