Recycling old drawing

Some time ago, i’m doing some sprites for someone. And as expected, some got rejected. I feel it kinda wasted. So, I just change it here and there, add or remove this and that, and then use it for some other project instead. Have you ever done the same? or you guys just scrap it altogether?


I always keep everything, more than anything because sometimes they can be used for a drawing in the future.