In one embodiment, a computer method of verifying an operator is human includes automatically selecting a pattern and dividing the pattern into a plurality of textures. The method further includes projecting each texture onto a different respective displayed element in a 3D experience. The method additionally includes randomizing a position and/or an orientation of at least one displayed element of the different respective display elements in the 3D experience. The method also includes receiving operator manipulations of the randomized elements to solve for the pattern and make the pattern appear/reappear. The method further includes granting access to the operator if the pattern is made to appear/reappear. Access is granted upon determining that the operator has made the pattern is appear/reappear, and access is denied if the operator fails to make the pattern appear/reappear.