@MasterQ32: Transparent objects are only supported in the forward renderer at the moment. To use, set sc_screen_default.settings.forward.enabled = 1; . You then have to set sc_skill(ENTITY* ent, SC_OBJECT_PASS, SC_PASS_FORWARD); for every object which should be rendered in the forward renderer instead of the deferred renderer. You can then apply any material/shader you want to these objects (e.g. a translucent shader).
There will be basic support for deferred translucent objects in the future using a variation of a technique called "alpha stippling" and "inferred rendering".

@exile: You have to enable forward rendering for particles to work. To do so, set sc_screen_default.settings.forward.enabled = 1; . You can now use particles.