First way would be simply taking objects behind the leaf in small distance, blur it with distancefactor and then simply make it appear as shadow/light depending on the effect wanted.

It's not too hard, but the fact is that they indeed are using SSS =P

there's no reason for the effect as seen there to be expensive. the way i described it would be able to produce exactly that.

it's the SSS on the skin that would be more of a load, which i can imagine would be a fair bit trickier and probably involve comparing backface and frontface depths and normals.

julz

They use HEAVILY LOD

At distance soldiers are simple animated meshes without shader,
i htink it's only on close that sss shader is used !

Even more ; the action is so intense and fast you don't have time to
look at it , a simplified one could do the job, i'm sure they have
some good optimisations similar to LOD even for shaders

What is obvious is objects like rocks poping up : they could have used progressive transparency like in Oblivion ?
LOD is the key

But i have a very good machine , and it's not sufficient

In fact each time lot more polygons , effects ,shaders are needed to be displayed for next gen games, so each time you must upgrade
hardware caus more power needed even with optimisations.

or you must put parameters all to LOW to have max fluidity like in Crysis

sss for 3DGS anyone tried to do one optimised and fast ?

Does anyone have any idea of how they make the trees to be broken when we shoot at them?

I have a fantastic trick for cut trees

When tree is cut , you replace it by one in memory that is the same
but in two meshes cutted at middle.
-a upper tree with palms
-the base tree in the floor

If for example it have been cutted low :
you push the vertex of the cutted region of the base part to the low and you
push also the vertex of upper part to the same low position of cut.
After that just apply physic to the upper part to make it fall down
naturally


Don't know if someone understood, but i'm sure they use this
trick , no processor maths , only a good trick that can work very very well ,
as good as their MASSIVE LOD use and SPRITES

TheExpert - so you are saying to split the mesh in realtime? Or they just make up one tree with several models each with physics applied?

I tried looking into SSS a while ago - from what I *tried* reading it looks complicated, and thats where I left it

expert's idea is to start with one model, and when it gets shot ent_morph into another model which only represents the lower half, and ent_create a model that represents the upper half (immediately, and placed where the old model was so it still looks the same). some vertex adjustments (vec_to_vertex or however it works) to adjust the position where one model starts and the other ends to where it was shot (on a fairly even tree texture the stretching won't be noticed). finally, make the top entity a phent and watch it go.

i have a couple of ideas for SSS (i'm an ambitious one) and plan to do some experiments after i finish school (final exam EVER on this coming monday!!), but i have a lot of other ideas begging to be tried out so we'll see how far that gets.

julz

there is a glsl shader for blender game enginewhich fakes sss. You should take a look at it if you need some ideas