Why do complex patterns like plaid get distorted on AI models and how do I fix it?

Quick Answer

Complex patterns (plaid, houndstooth, fine stripes) get distorted because standard AI models struggle with "UV mapping"—understanding how a 2D pattern wraps around a 3D object like a human body. The AI treats the pattern as surface noise rather than texture. To fix this, use Nightjar's high-resolution upscaler (up to 4K) and its specialized Virtual Try-On feature, which is trained to respect the topology of clothing, ensuring lines curve correctly around the model's form.

The "Moiré" and Distortion Effect

When AI resizes or generates patterns, it often creates "aliasing" or jagged lines. Plaid shirts turn into a soup of pixels.

How to Fix Pattern Distortion

• Resolution is Key: Low-resolution generation (512x512 or 1024x1024) does not have enough pixels to resolve fine lines. You must upscale. Nightjar allows upscaling to 4K, which clarifies the pattern lines.
• Preserve, Don't Generate: Never ask the AI to generate a plaid shirt. Always upload the photo of the plaid shirt and ask the AI to place it.
• Lighting Angle: Flat lighting kills patterns. Use a style with side lighting (like Nightjar's "Editorial/Styled") to create micro-shadows in the fabric weave, which helps the eye interpret the pattern correctly.