You can create a new fill or duplicate a similar one and adjust its settings to what you want. For example the 1:8 fill. Duplicate, adjust spacing and rotate the angle so the lines are horizontal.
Then apply the fill to your log and chink material.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"