Math Thing with Hole

sketchfab

y = (x^2 + y^2 + 1)^0.5 with a plane rotating 90 degrees about the x axis from x, y, z = 0, 0, 0 and hole at x, y, z = 0, 0, 0 In the original orientation, +y is into the screen, +z is to the right, and +x is up. In Matlab language, U = -10 : 0.1 : 10; V = -10 : 0.1 : 10; [x,y] = meshgrid(U, V); z = sqrt(x.^2 + y.^2 + 1); surf(x, y, z) surf2stl('NOthisone.stl', x, y, z) zlim([0 10]) applied in Cinema 4D