AndrSurf3D

Surfaces (3D and anaglyph) in rectangular "z = f (x, y)" and spherical "x=f(a,t), y=f(a,t), z=f(a,t)" coordinates.

You can define any function and view its graphical representation.
Save/open your surface data.

Open any kind of image and use it for texture

Capture the screen from the app menu. The image is saved in the Pictures folder.