.trabalhos {
    background-image: linear-gradient(135deg,
                        transparent,
                        transparent 14px,
                        rgba(0, 0, 0, 0.1) 14px,
                        rgba(0, 0, 0, 0.1) 15px,
                        transparent 15px,
                        transparent);
    background-size: 20px 20px;
    background-attachment: fixed;
}
.blog {
    background-image: linear-gradient(45deg,
                        transparent,
                        transparent 14px,
                        rgba(255, 255, 255, 0.1) 14px,
                        rgba(255, 255, 255, 0.1) 15px,
                        transparent 15px,
                        transparent);
    background-size: 20px 20px;
    background-attachment: fixed;
}
dentro do blog usei o -135deg, fiz esse teste e as linhas ficam contrarias também, estaria correto usar esse -135deg?