I"m currently struggling with creating a grassy scene. I detailed an issue I'm having with scale in this question, but I'm also having an issue with rotation and direction which I'll ask here.
I would like the rotation of each blade to be randomized around the Z axis to give the grass less of a structured, "combed" look. I though the panel section labeled "Rotation" looked promising, but as soon I enabled it all the grass particles laid down parallel to the X axis. This despite the fact that the orientation axis is selected as "Global Z", which is straight up in my picture. I only get the desired effect if I set the axis to "Global X". I could just set it there and be done, but I prefer to know what I'm doing.
All transforms have been applied to the emitter and source objects.
Toggling "Object Rotation" only rotates the blade along its local Z axis 90 degrees, regardless of what the axis orientation is set to.
How do I get the blades to be oriented in the direction I want and rotate randomly along the blades Z axis?