Redshift is a commercial, GPU-accelerated 3D rendering software developed by Maxon. It requires a paid license (either a subscription or a perpetual license, often bundled with Cinema 4D). Searching for a "free download" of version 3.5.13 would lead to cracked, pirated, or unauthorized copies.
Distributing, linking to, or promoting methods to obtain cracked software violates copyright laws, software licensing agreements, and this platform's policies against facilitating piracy. I cannot provide essays, instructions, or resources related to bypassing software paywalls. Redshift 3.5.13 Free Download