[...]The only exception is that the grass doesn't get crumpled upon, but I can't blame anyone for not being able to succesfully do that.
Crumble grass wouldn't be that hard to achieve. The reason why I didn't add any disturbance when the feet hit the ground is because the location in the background plate is a well grazed field. So in other words cattle have chewed the grass right down to its roots and compacted the soil making it quite solid. So the only way to "crumble" the surface would be to apply force with something heavy, a lot heavier than Guy anyway.
However, if the ground were softer and the grass were longer it would be quite simple to add this crumbling you write of.
- Open up the background plate in a program like Photoshop and isolating the area where the feet hit the ground.
- Draw a change on the ground (like disturbed dirt or slight grass crumbling) when the foot comes in contact then export it as a new image.
- Repeat the process every time the foot hits the ground.
- Take sequence of images in the video editing program and place them in the exact position beneath the feet in order of least changed to most changed.
That should get you an artificial result, but nothing beats the real thing!
