skull glasspack footprints wh40k compatible green stuff world40k Footprints compatible Green Stuff Worlds glasspacks or transparent footprints are 1 mm thick transparent bases that precisely outline the footprint of buildings and ruins for games compatible with Warhammer 40,000 and WTC events. Made from flexible, shatter resistant glasspack plastic, they preserve your battle mats look and avoid step ups that trip miniatures. Each sheet has painted edges showing exactly where the terrain area begins and ends,