Steps Guide

• Open "grass.max" file
• Select "grass sample" object
• Apply Bend modifier: angle=0.5, dir=90, Y axis
• Second Bend: angle=8, dir=0, Z axis
• Animate Bend Direction: 0 at frame 0, 360 at frame 100
• Open Track View to edit Direction
• Use Cuve Editor to create an endless animation
• Unhide "Rectangle01" and "terrain" objects
• Create Forest object using "Rectangle01" as the area
• Geometry: width=700, height=300
• Use "grass sample" as a Custom Object
• Distribution: dense, 8000x8000, lock aspect ratio
• Set camera to "Camera01". Enable "Use on Custom Objects" checkbox
• Assign Surface to "terrain" object
• Random Scale: 100% to 120%
• Random Tint: 0% to 50%, default color range
• Display: viewport simplification level = 2
• Animation: "Random from Geometry", time offset=20, samples=4
• Render video