One of the biggest giveaways of a "CG" environment is perfectly synchronized animation. If you have wind-blown grass, you don’t want every blade swaying in unison.
If you are still placing trees by hand, stop. Open Forest Pack. Open the Effects rollout. Write one line of code for altitude scaling. You will never look at a render the same way again. forest pack effects
float d = getDistanceToSpline(forest_spline); if (d < 10) fpItem.scale = d/10 * 1.0; One of the biggest giveaways of a "CG"