Cinema 4D Quick Tip: Constrain Random Clone Rotation to 90 Degree Increments
У вашего броузера проблема в совместимости с HTML5
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The Random Effector doesn't provide an easy way to restrict the possible values so you can restrict random rotation to 90 degree increments. You'll learn how to achieve this effect with the help of the Formula Effector, and the rnd() and round() functions.