Thanks for this script. One bug-report, and a feature requests.
Bug: File is marked with transparency by color, even if no transparent color is available.
Feature: Compressed files, who can I pay? ;)
Viewing post in Aseprite Script: Amiga IFF/ILBM Exporter comments
Hey there, thanks for the message! Can you describe the bug you are experiencing in more detail? You can send in a support email if that works better for you.
As for adding the compressed IFF feature... yeah... that's something on the horizon. It'll require some analysis time and hopefully will be able to get to it soon. 😅
Maybe it is my inexperience with Asesprite. My image has only background, no layer, I'm unable to selected 'none' as transparent color, the color that is selected has no alpha channel.
In short whatever I have tried the export script always picks one color as transparent. I really want to be able to export an image as solidly opaque.
If I understand you correctly, I think this is more of an Aseprite question than a question about my script. The only thing that my script does in regards to a "transparent colour" is that all of the transparent pixels in your Aseprite image (if any exist) will be converted to the IFF file using the colour index that you've identified as the transparent colour (as shown in the Sprite → Properties window.)
So, for example, if you have set your transparent colour index to #0, and it is black, and your sprite is a simple yellow circle surrounded by transparent pixels, the IFF file exported will be a yellow circle with black pixels all around it. Remember that IFF files don't support alpha channels, so your final IFF file will always be completely opaque.
So all you really need to do in Aseprite, is just draw your sprite on a transparent background and export to an IFF file as normal. That file will not have a transparent background. If you'd rather not draw your sprite on a transparent canvas, and would rather see a solid colour for the canvas instead, then when you create a new Aseprite image, be sure to select "White" or "Black" as the background instead of "Transparent" in the New Sprite window.
Hope that helps!