i do everything you are supposed to do in vanishing point,i create the area in vanishing point, make sure it shows the grid, i copy the image i want to put ni it. But when i go to paste, the grid lines dissapear and the image doesnt paste
Before pasting, have you properly created your planes? Are the grids showing in blue color? It would help to see a screen shot of the image with your vanishing point grids in place just prior to pasting.
Here is a pretty detailed page on how to use the vanishing point tool - perhaps you could let us know where the process breaks. Note that the section on pasting is about two-thirds of the way down the page, but the prior information is very useful if you're new to vanishing point:
Hey there! I had this problem after watching a tutorial but I figured out that you're not supposed to leave the vanishing point screen. DON'T PRESS OK. just paste and adjust from there.