what is scene state set ? what it has? how it work?
how it work with shaders?
It's hard to say without more context, but you're probably talking about the collection of rendering API state required to draw a scene. Your rendering API is generally OpenGL or Direct3D, and the "state" refers to all the various things you can configure or twiddle in the rendering of a scene. This includes but is not limited to:
- which shader is active at each stage of the pipeline (vertex, geometry, fragment, et cetera)
- which textures are active
- which buffers are active
- how blending is configured
- which color, depth, stencil, et cetera writes are active, and which related tests are active
- which target or targets to render to
and so on.