Hi!
Does anyone know how to extract an object's icon from an .iff file, or what the icon image size should be? I want to replace it for some objects, but I have no idea how to do it.

Like the catalog icon? The little one? That's a BMP_ resource inside the iff. BMP_ resource data is just a raw bitmap. If you wanted to extract that, you could export it as a data only file from IFF Pencil (with a file ending of bmp instead of bin) and it'd just be a normal image. You could import a bitmap the same way and set it as a BMP_ resource and give it the Catalog ID number (usually 2000 but basically the same as whatever one you exported so you overwrite it) and optionally name the resource "Catalog" in IFF Pencil but that's just for your benefit and doesn't have to be named that way.

A catalog icon BMP_ resource is a 74x37 256-color bmp with an unhighlighted/non-clicked image on the left and a highlighted/clicked image on the right.

I've attached a few examples here (converted to PNG so the forum software will see them) that I happened to have lying around: one autogenerated thumbnail (of a very bad draft version of a bed I was working on porting, ignore what's actually *in* the thumbnail ), one beta thumbnail resized (beta thumbnails, at least from Steering Committee, are the same layout but are 100x50, this one has been resized to 74x37), and one of a sound object of LUCPIX's that I for some reason see in the folder even though I don't know why I would have exported that... The reason for sharing three is just to show that stylistically the two halves of the image could be ANYTHING.

Thanks!