hi
i made a car that has 21 pieces and an invisible model for body.
that model is the real physic car and other 21 pieces are just renderd for visual .
i need to have shadow from that invisible model.
is there any solution?

I don't know if this will help, but try to make object TRANSLUCENT instead of INVISIBLE and lower it's alpha till 0.001 (try 0 as well). I'm not sure if this will help, just an idea.

it can be done simply by

my.shadow = you;

where my is the drawn car, you is any (invisible) shadow casting entity (sprite for decal shadow, model for stencil shadow)

it works.
thank you very much.
camera_ambient.red and green and blue also is affected on shadow.
if all is 0,shadow will disappear.