Heya, Davo. Long time no see :) - You and your bump map problems.....I swear, you've got a new one every month. As for the material editor, I know it's picky at times. Sometimes to even get it to realize that you've made a change, you have to do exactly what you've done - pick the material a second time. I don't know what causes it, but I've never ran into any huge problems like what you're describing - is this a common occurance with your scenes? And do you have the latest service packs for your version?