Janet Wickell has posted some very interesting information on fabric grain, Understanding Fabric Grain Improves Your Quilting Skills, and the importance of quilters and fabric artists being knowledgeable about this topic.   Using straight grain pieces and bias cut pieces can produce totally different results…and sometimes not the results you desire if you don’t know the characteristics of each.
There are a number of articles suggested in addition to Janet’s information about fabric grain and when to use what.
This post builds upon my previous one, Learning Which Quilting Fabric to Select.