Render Quality Issues

Not getting the results you expected? Here's how to improve quality.

Understanding AI rendering

AI rendering is different from traditional rendering:

• Probabilistic: Results vary slightly each time
• Interpretive: AI interprets your model and prompt
• Creative: Sometimes takes creative liberties

This means:

• Some variation is normal
• Iteration is part of the process
• Clear prompts lead to better results

Common quality issues

Render doesn't match my model

The AI may interpret your 3D model differently than expected.

Solutions:

1. Check your viewport

   • Ensure important elements are visible
   • Set up clear camera angle before capture

2. Add detail to your prompt

   • Describe key features: "three-story building with glass curtain wall"
   • Mention important elements explicitly

3. Use reference images

   • Upload an image showing the style you want
   • Helps AI understand your vision

Blurry or low quality output

Solutions:

1. Check your viewport quality

   • Use a higher-quality display mode in Rhino
   • Ensure your view is clearly captured

2. Simplify complex scenes

   • Very complex geometry may confuse the AI
   • Focus on key elements

3. Try different styles

   • Some styles produce crisper results
   • "Photorealistic" usually gives best quality

Colors are wrong

Solutions:

1. Specify colors in your prompt

   • "White facade" instead of just "facade"
   • "Warm wood tones" instead of just "wood"

2. Use reference images

   • Show the AI the color palette you want

3. Check lighting settings

   • Sunset/sunrise adds warmth
   • Overcast gives neutral colors

Artifacts or distortions

Sometimes AI generates strange elements or distortions.

Solutions:

1. Regenerate

   • Try generating again; results vary
   • Minor artifacts often disappear on retry

2. Simplify your prompt

   • Complex prompts can cause confusion
   • Focus on essential elements

3. Avoid conflicting descriptions

   • Don't describe contradictory elements
   • Keep style consistent throughout prompt

Tips for better quality

Optimize your 3D view

Before capturing:

• Clean viewport: Hide unnecessary elements
• Clear composition: Frame the important parts
• Good angle: Choose a flattering perspective
• Appropriate display mode: Use shaded or rendered mode

Write effective prompts

Quality prompts lead to quality results:

• Be specific: Details help the AI understand
• Include atmosphere: Lighting, mood, weather
• Mention materials: Surfaces, textures, finishes
• Keep focused: Don't overload with too much info

See our prompt writing guide for more tips.

Use appropriate style

Different styles suit different purposes:

Iterate and refine

1. Start simple — Basic prompt to see baseline
2. Review results — What's working? What's not?
3. Adjust prompt — Add or change details
4. Try variations — Generate multiple versions
5. Pick the best — Select favorite for further use

When to regenerate vs. adjust

Just regenerate when:

• Minor variations not quite right
• Small artifacts present
• Generally close to what you want

Adjust prompt when:

• Style/mood is wrong
• Key elements missing
• Consistent problems across attempts

Change settings when:

• Lighting quality wrong
• Weather/atmosphere off
• Overall style mismatch

Quality expectations

What AI renders excel at

• ✅ Quick concept visualization
• ✅ Mood and atmosphere
• ✅ Style exploration
• ✅ Client presentation concepts
• ✅ Marketing and portfolio images

Current limitations

• ⚠️ Perfect geometric accuracy
• ⚠️ Exact matching to reference
• ⚠️ Technical/construction drawings
• ⚠️ Consistent specific details

Gemini AI specific tips

FastRender uses Google Gemini for generation. Some tips specific to this model:

Temperature and creativity

The AI may interpret prompts creatively. To reduce variation:

• Use more specific, detailed prompts
• Include reference images
• Describe exactly what you want

Handling blocked content

If the AI refuses to generate or produces unexpected results:

• Check for potentially problematic terms
• Rephrase in neutral, professional language
• Avoid terms that might trigger safety filters

Getting help

If quality issues persist:

1. Share examples in Discord
2. Email support at hello@fastrender.ai with:
   • Screenshot of your 3D model
   • Your prompt text
   • The generated result
   • What you expected instead

The community and our team can help identify what to adjust.