Hi,
It would help a lot indeed! I've never used those formats, but as far as i know, both DDS and TGA are supported by Qt (which i'm using for this) with some limitations, so adding them shouldn't be a problem (i hope). About parallax maps, i must investigate how are they generated, and how to apply it on a GLSL shader for the preview. I've only seen parallax maps in 2D textures for 3D games.. Are they also used in 2D games?