MUMBAI: First it was Avatar then Alice In Wonderland. The success of these two 3D animated films has resulted in a craze among Hollywood studios to convert big films from 2D to 3D.

Director James Cameron believes that the studios are rushing to take advantage of the public‘s appetite for 3D films, but using computers to convert standard 2D films to 3D, instead of filming in 3D “gives audiences a cheaper-looking film and could do more harm than good if audiences get turned off.”

"The problem is these decisions should be made by filmmakers, they shouldn‘t be made by studios, because if it was up to studios they‘re going to sacrifice quality for lower cost," Cameron has reportedly said.

Shot in 3D, Avatar has gone on to become the top-grossing movie of all-time with a gross of $2.7 billion at the box-office.

Cameron is not the only filmmaker questioning studios‘ headlong rush to convert films to 3D,Transformers maker Michael Bay has questioned the move too.

Studios are rapidly converting now that Walt Disney Co has seen its 3-D conversion "Alice in Wonderland" sell more than $570 million in tickets since its March 5 debut.

On April 2, Warner Bros, a division of Time Warner Inc, will release its action movie Clash of the Titans as another 2D to 3D conversion.