Then, if something isn't transparent at all, from the image file, why does 50 make it half transparent? This don't make sense. 50, yes, is the default, but wouldn't that affect everything, making even transparent objects 50% more transparent than they actually are? It's unusual and confusing. When one thinks about it, setting something that's already transparent to 50% transparency would make it 50% more transparent when, normally, if something is fully transparent, it'd become 50% transparent. It don't make sense and is illogical.