glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
hdr.levels > 1 ? GL_NEAREST_MIPMAP_NEAREST : GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
hdr.levels > 1 ? GL_NEAREST_MIPMAP_NEAREST : GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);