func AddSkyMesh(scene *ng.Scene, meshID int) {
cubeMapID := ng.Core.Libs.Images.TexCube.AddNew()
cubeMap := &ng.Core.Libs.Images.TexCube[cubeMapID]
LibIDs.ImgCube["sky"] = cubeMapID
cubeMap.InitFrom[0].RefUrl = "tex/sky/east.png" // positive X
cubeMap.InitFrom[1].RefUrl = "tex/sky/west.png" // negative X
cubeMap.InitFrom[2].RefUrl = "tex/sky/up.png" // positive Y
cubeMap.InitFrom[3].RefUrl = "tex/sky/down.png" // negative Y
cubeMap.InitFrom[4].RefUrl = "tex/sky/north.png" // positive Z
cubeMap.InitFrom[5].RefUrl = "tex/sky/south.png" // negative Z
fxID := ng.Core.Libs.Effects.AddNew()
LibIDs.Fx["sky"] = fxID
fx := &ng.Core.Libs.Effects[fxID]
fx.EnableTexCube(0).Tex.ImageID = cubeMap.ID
fx.EnableCoords(0)
fx.DisableCoords(0)
fx.UpdateRoutine()
matID := ng.Core.Libs.Materials.AddNew()
ng.Core.Libs.Materials[matID].DefaultEffectID = LibIDs.Fx["sky"]
LibIDs.Mat["sky"] = matID
scene.SetNodeMeshID(0, meshID)
scene.Root().Render.MatID = matID
}
