Questions and postings pertaining to the development of ImageMagick, feature enhancements, and ImageMagick internals. ImageMagick source code and algorithms are discussed here. Usage questions which are too arcane for the normal user list should also be posted here.
To be helpful we would need an original EPS, the converted PNG, the command you use to convert the EPS to PNG, and a description of how the PNG preview differs from the original EPS. Once we have this information, we will be in a position to comment.