Low-quality image generation at 512×512 resolution

[yuezhixiong]

First, thank you for your amazing work on hidream! It works wonderfully for high-resolution outputs (e.g., 1024×1024), but I’ve noticed a significant drop in quality when generating images at ​​512×512 resolution​​.

Take the dev version as an example. The generation prompt is "The setting is a corporate conference room with a large screen displaying financial data. Elon Musk stands confidently at the front, while the CFO sits beside him, looking concerned. Musk gestures with his hands as he discusses the Q1 earnings report, which shows a 9.2% YoY revenue decline and 39% adjusted income drop. A graph on the screen shows a downward trend in
revenue, while Musk's expression remains optimistic. The CFO points to a chart indicating weak deliveries due to factory retooling and growing political hostility. Musk then announces plans to spend less time at DOGE and launches an affordable model on schedule, lifting shares 5%. "

The result of 1024 resolution:

The result of 512 resolution: