.cpp

if (lua_istable(L, 2)) {
		SkyParams sky_params;

		// just in case we're not supplied a bgcolor
		sky_params.bgcolor = video::SColor(255,255,255,255);

		lua_getfield(L, 2, "sky_color");
		if (!lua_isnil(L, -1))
			read_color(L, -1, &sky_params.bgcolor);
		lua_pop(L, 1);
		
		lua_getfield(L, 2, "type");
		if (!lua_isnil(L, -1))
			sky_params.type = luaL_checkstring(L, -1);
		lua_pop(L, 1);
		//lua_getfield(L, 2, "textures"); we're a segfaulter

		if (lua_istable(L, 2)) {
			lua_pushnil(L);
			while (lua_next(L, 2) != 0) {
				// key at index -2 and value at index -1
				if (lua_isstring(L, -1))
					sky_params.params.emplace_back(readParam<std::string>(L, -1));
				else
					sky_params.params.emplace_back("");
				// removes value, keeps key for next iteration
				lua_pop(L, 1);
			}
		}

.lua

player:set_sky({
	sky_color = minetest.rgba(fog.result.red, fog.result.grn, fog.result.blu), 
	type = "skybox",
	textures = {
       		"texture1.png",
       		"texture2.png",
       		"texture3.png",
       		"texture4.png",
       		"texture5.png",
       		"texture6.png"
        },
	clouds = false,
	custom_fog = true,
	sun = {
		visible = true,
		yaw = 90,
		tilt = 0,
		texture = "cobble.png",
		sunrise_glow = true,
	},
		
	moon = {
		visible = true,
		yaw = -90,
		tilt = 0,
		texture = "default_mese.png",	
	},

	stars = {
		visible = true,
		yaw = 0,
		tilt = 0,
		count = 200,		
	}
})