porting dx9 to dx10 or later - how hard?
dx10 will get me real instancing for grass - and texture arrays. dx11 will get me things like NVIDIA turf effects.
everything i'm finding online about rendering grass is dx10 or newer.
FVF gets replaced by.... i've already done some, but i forget the name!
and i'd have to supply my own basic shaders? right?
anything else really major? minor variations in the matrix declarations as i recall.
i may have to bite the bullet and step up to a newer version of DX. i hate to have to do so, so late in the project, but you have to break a few eggs to make a real mayonnaise.