The only real problem I see is why the pig's suit gives a shadow, but he does not.

If you put a light from left to right, up to down on the bike to test?
Test with an infinite light, and turn all the other lights off.
Somtimes a shadow gets washed away by other lights.

look through the shadowcam for that infinite light and see what the light sees.
Then agjust the light to your liking.
Then one by one, load the other lights again, and check what lights blow your shadow away.
Also check the Y position of the road. is it above or below the ground plane.
Is the road marked as shadow catching.
Sorry, many questions, I know.
Go step by step,
happy Posering
Tony

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!