I have Earth globe mesh(sphere+material),and now I’d like to draw some simple marks on it’s surface,like an white X,a small circle,square and so.It’s very important that those marks keep their’s position (like childs of the sphere) while rotation of the globe.
You could instantiate an object with an unlit shader and make the Earth a parent. Because you know the size and geometry of the object you can easily offset the object from its origin to match the surface of the Earth (as long as it’s completely round with no mountains etc).
You could also use a raycast to get the position and rotation of the contact point to align the object perfectly upon the surface from its origin. To make the decal object align mesh to mesh you’ll have to go a bit more advanced.