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 :
119264
Registered Date :
2012.06.04
21:46:03 (*.226.203.124)
Trackback :
http://blendernews.org/xe/1262/3f3/trackback
Article URL :
http://blendernews.org/xe/1262
List of Articles
Subject Datesort Views
Blender Retrospectives 2020 Blender Retrospective Feb 20, 2021 211181
Tutorials Free Online Blender Tutorials Released in 2019 Worthy of Your Note - for Animation & VFX file Jan 25, 2020 563312
Tutorials Free Online Blender Tutorials Released in 2019 Worthy of Your Note - for CG, Games & Viz file Jan 25, 2020 426417
Tutorials Top 12 Free Online Blender Tutorials Released in 2019 file Jan 25, 2020 432175
Tutorials Top 15 Highest-Rated Free Online Blender Tutorials Released in 2019 file Jan 25, 2020 376076
Tutorials Free Online Blender Tutorials Released in 2018 for Blender 2.8 file Jan 23, 2019 345242
Tutorials Free Online Blender Tutorials Released in 2018 Worthy of Your Note - for CG, Games & Viz file Jan 23, 2019 684544
Tutorials Free Online Blender Tutorials Released in 2018 Worthy of Your Note - for Animation & VFX file Jan 23, 2019 408628
Tutorials Top 12 Free Online Blender Tutorials Released in 2018 file Jan 23, 2019 345149
Render of the Year Render of the Year Awards 2018: Winners Annouced file Jan 02, 2019 381888
Blender Retrospectives 2018 Blender Retrospective file Jan 02, 2019 376277
Tutorials Top 12 Free Online Blender Tutorials Released in 2017 file Jan 09, 2018 969212
Blender Retrospectives 2017 Blender Retrospective file Jan 01, 2018 697012
Render of the Year Render of the Year Awards 2017: Winners Annouced file Dec 26, 2017 550988
Tutorials Top 12 Free Online Blender Tutorials (Videos) Released in 2016 file Jan 16, 2017 765624
Blender Retrospectives 2016 Blender Retrospective file Dec 29, 2016 1060542
Render of the Year Render of the Year Awards 2015: Seven Winners Annouced file Jan 20, 2016 790777
Blender Retrospectives 2015 Blender Retrospective file Jan 12, 2016 762509
Tutorials Top 12 Free Online Blender Tutorials Released in 2015 file Jun 26, 2015 805861
Render of the Year Render of the Year Awards 2014: Five Winners Annouced file Jan 02, 2015 814067
Tutorials Top 12 Free Online Blender Tutorials Released in 2014 file Dec 11, 2014 852940
Product Visualization PRODUCT VISUALIZATION IN BLENDER for the week of November 19, 2012 file Nov 19, 2012 44306
Render of the Week 'dune_boiserie' by Gabriele Mariotti and Alan Zirpoli - the Winners of the Week of November 19, 2012 file Nov 19, 2012 46908
Architectural Visualization ARCHITECTURAL VISUALIZATION IN BLENDER for the week of November 12, 2012 file Nov 13, 2012 47575
Render of the Week 'Wheelchair House' by Dion Moult - the Winner of the Week of November 12, 2012 file Nov 12, 2012 95323
Render of the Week 'The Most Beautiful Beach' by Matej Hudak - the Winner of the Week of November 5, 2012 file Nov 05, 2012 44378
Render of the Week 2012 Bi-annual Render of the Week Award Video, from April 30 through October 22 file Oct 30, 2012 41661
Product Visualization PRODUCT VISUALIZATION IN BLENDER for the week of October 22, 2012 file Oct 23, 2012 48171
Render of the Week 'Alien - Battle' by Alessandro Chiffi - the Winner of the Week of October 22, 2012 file Oct 22, 2012 55666
Render of the Week 'Alpha Rest Room' by Enrico Cerica - the Winner of the Week of October 15, 2012 file Oct 15, 2012 90231
Suzanne Awards 2012 SUZANNE AWARDS WINNERS ANNOUNCED file Oct 14, 2012 35850
Render of the Week 'Fantasy Ambient' by Cristian Enache - Winner for the Week of October 8, 2012 file Oct 09, 2012 47169
Render of the Week 'Fire Flower' by Alexey Lugovoy - Winner for the Week of October 1, 2012 file Oct 01, 2012 54669
Architectural Visualization ARCHITECTURAL VISUALIZATION IN BLENDER for the week of October 1, 2012 file Oct 01, 2012 49436
Production Focus TEARS OF STEEL: Online Release & Production Files file Sep 27, 2012 41588
Render of the Week 'Island' by Agustin Benavidez - Winner for the Week of September 24, 2012 file Sep 25, 2012 56364
Product Visualization PRODUCT VISUALIZATION IN BLENDER for the week of September 17, 2012 file Sep 17, 2012 53411
Render of the Week 'Forest Path' by Igor Kozyrev - Winner for the Week of September 17, 2012 file Sep 17, 2012 48402
Render of the Week 'Snail' by Maciej Stokowiec - Winner for the Week of September 10, 2012 file Sep 10, 2012 45146
Product Visualization PRODUCT VISUALIZATION IN BLENDER for the week of September 10, 2012 file Sep 10, 2012 49051
Architectural Visualization ARCHITECTURAL VISUALIZATION IN BLENDER for the week of September 3, 2012 file Sep 03, 2012 60430