Deep Dive into RSSM: The Core Engine of World Models

Sun, 02 Aug 2026 00:00:00 +0000

In the previous article, we covered the basic concepts of world models and the overall architecture of DreamerV3. Some readers asked for a deeper explanation of how RSSM actually works. This article dissects the core component of the Dreamer family of world models.

I’ll try to make the math clear without being overly formal. After all, our goal is to understand the principles, not prove theorems.

Why We Need State-Space Models

Before discussing RSSM, let’s step back and ask: why do we need state-space models at all? Can’t we just use an RNN or Transformer directly?

State Space on WorldSense Tech Blog

Deep Dive into RSSM: The Core Engine of World Models

Why We Need State-Space Models