Take the tour ×   I didn't know what the exactly name for this
effect, so I just paste the link of the video here, I want to
know what is the knowledge background needed if I want to create
such a effect?  share|improve this question add comment  1
Answer  up vote 3 down vote accepted  The twisting/distorting
effect can be done by making a triangle mesh that is initially a
rectangle covering the screen, but with a fair amount of
subdivision. Then you let the user alter the shape by clicking
and dragging. One way to do that is by soft selection: when they
click, you find all the verts within a certain distance of the
pointer and compute weights that vary smoothly from 1.0 at the
pointer to zero at the outside of the radius; then you adjust
the positions of the points by weight * the drag vector. Another
way to do it might be with a soft-body physics model, although
that's a lot trickier.  You apply an image to it by simply
putting a texture on the mesh. How they get the Windows desktop
to be the texture I don'