Don't panick , the high poly warning just means that the dress have a lot of polygons , and if you have a bad computer ( for exemple a low end computer ) , the dress might make your game lag , but if you have a normal computer or higher , it should be fine !
What are polygons ?
Polygons are what form this dress , they are tiny triangles that are all around the dress. It's a bad explanation , but I tried xD
