with 2-4 sentences concise, then Read original. Use only info provided. The description is truncated: ends with "which we propose to address t". Probably incomplete, but we must use only what's given. So summarize: SynCity 3000 is a framework for generating globally coherent 3D scenes with fine-grained layout control, extending image-to-3D generators to scene scale by adapting the generator as a convolutional operator, fine-tuned on synthetic scene data from a new engine. That's 2 sentences. Then link. Make sure HTML only, no extra text. Ensure class="summary". Provide link with URL given. Let's craft:

SynCity 3000 introduces a framework that generates globally coherent 3D scenes while allowing fine‑grained layout control by adapting image‑to‑3D generators into a convolutional operator, trained on synthetic scene data from a new engine.