Do you mean the textures as seen from WED or in the engine? If it's in WED, go to file > preferences, click the video out tab, then choose the GXL object ending with 8A for both the 2D and 3D views. I think it's GXL2DX8A.DLL. GXLBASE.DLL uses 8-bit color so things in WED that way will look bad. Using the 8A one will use true color, like that in MED.

"You level up the fastest and easiest if you do things at your own level and no higher or lower" - useful tip My 2D game - release on Jun 13th; My tutorials