iff to dds conversion is pretty much certainly related to export between two raster formats, perhaps for use as surface textures for computer game modding. Your best option in this case is to use some dedicated graphics converter, for example XnConvert.
Home > Search converters: iff to dds
Conversion of iff file format to dds file format beta
Search for iff to dds converter or software able to handle these file types.
Convert Amiga Interchange File format to DirectDraw surface data.
We have found one software suitable in our database for this conversion.
Multiplatform software 
- convert iff to dds on any platform
XnConvert
A cross-platform batch image transcoder compatible with 500 picture image formats
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from iff file | No | No | No | No | No | Yes | Yes | No |
to dds file | No | No | No | No | No | Yes | Yes | No |
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.
Additional links: Open iff file, Open dds file
IFF
An iff file extension is related to the Amiga Interchange File format used to transfer documents to and from Commodore Amiga computers.
DDS
Files with dds extension can be usually encontered as 3D textures from DirectDraw Surface format.
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