After seeing the amazing work Chris Jones did in Lightwave using tension maps, I decided to see how Blender’s stress mapping works.
The uploader keeps rejecting my Blend file, but the image below should explain most of it.
It’s pretty straight forward. You create a gradient texture, which must be above the displacement texture in the texture stack. Make sure that Stencil and RGB to Intensity are checked. In the Mapping Coordinates, select Stress.
(I checked the Color setting in the Influence panel so that the pink area would show where the compression stresses are at.)
For the wrinkle texture, you would ideally sculpt the wrinkles and bake that out as a displacement map, but I just painted a quick wrinkle map in Photoshop Elements. The cyclinder was UV unwrapped and the wrinkle texture applied to it. Rather than a Displacement Modifier, I used the Displacement in the texture Influence panel.
One thing I haven’t been able to figure out is how Chris used multiple displacement maps in the same area. For example, when the eyebrows move up, there are horizontal wrinkles on the forehead, but when the eyebrows are scrunched down and in, there are vertical wrinkles there. Not sure how that would be done in Blender. Is it the up and down motion of the eyebrow bones that trigger the change? He’s got some complicated node setup in Lightwave that I can’t understand.
Here’s an example of what I’m talking about…