something wrong with my hdr reflection cubemap on model? can anyone help me.
Without code it is hard to figure where the problem comes from.
Actually it’s a typical problem with HDR textures.
You’re decoding the cube map wrong or use low precision texture format. 
Show us the code you use to sample the cube map. 
actually i just took some hdr picture apply on it. how to i sample a 8bit per channel cubemap to high percision cubemap.