How to Build Custom LUT Previews in Blackmagic Camera

Preview your cinematic look without baking it in

One of the most powerful features of the Blackmagic Camera app is the ability to preview LUTs in real time while still recording clean Apple Log or Apple Log 2 footage.

Most creators either ignore this feature or misunderstand it. They either bake the LUT into the footage or shoot completely flat without any visual reference, leading to exposure mistakes and inconsistent results.

This guide explains how to properly build and use custom LUT previews inside Blackmagic Camera, so you can shoot confidently while keeping maximum grading flexibility.

 

1. Why LUT Preview Matters

When shooting in Apple Log or Apple Log 2, the image looks flat and desaturated.

If you expose based only on that flat image:

• You may underexpose
• You may misjudge highlight rolloff
• Skin tones may appear darker than they really are

Previewing a calibrated LUT:

• Helps visualize final contrast
• Makes exposure decisions easier
• Reduces uncertainty on set
• Improves creative consistency

Important distinction:

Preview LUTs do not bake into the footage unless you choose to export that way.

 

2. Understanding the Difference: Preview vs Burn-In

Blackmagic Camera allows two approaches:

Preview Only

• LUT visible on screen
• Log footage recorded clean
• Maximum flexibility in post

Burn-In LUT

• LUT permanently applied
• No way to recover original Log data

For professional workflows, always use Preview Only.

 

3. Preparing LUT Files for Blackmagic Camera

Blackmagic Camera supports .cube LUT files.

Before importing:

• Ensure LUT is designed for Apple Log or Apple Log 2
• Use LUTs calibrated for Rec.709 conversion
• Avoid generic LUT packs not built for iPhone color science

Proper calibration is critical. A LUT not designed for Apple Log can distort skin tones and break highlight rolloff.

 

4. Importing LUTs into Blackmagic Camera

Step-by-step:

1. Transfer LUT file (.cube) to your iPhone
2. Open Blackmagic Camera
3. Go to Settings → LUTs → LUTs Manager
4. Import LUT from Files
5. Select it as monitoring LUT

Once activated, the preview changes immediately.

 

5. Calibrating Exposure With a Preview LUT

Once your LUT preview is active:

• Check waveform, not just preview
• Confirm skin tones remain in correct IRE range
• Ensure highlights are not clipping

Preview LUT helps you judge contrast, but waveform remains the objective reference.

For example, previewing a cinematic look from the iCine Pro Bundle while recording Apple Log allows you to:

• Maintain consistent exposure
• Avoid crushed shadows
• Visualize final contrast without committing

 

6. Creating Multiple Preview Looks for Different Projects

Professional workflows often require multiple preview LUTs:

• Daylight look
• Indoor warm look
• High-contrast commercial look
• Soft narrative look

Saving multiple LUTs inside Blackmagic Camera allows fast switching depending on scene mood.

For example:

• iRED Mode LUT Pack for bold contrast-driven scenes
• Kodak Vision 3 LUT Pack for warm cinematic daylight
• Fujifilm 3513 LUT Pack for softer tonal response
  

Each can function as a preview without baking into footage.

7. Maintaining Consistency Across Multiple Shooting Days

Preview LUTs help maintain consistency between:

• Different locations
• Changing light conditions
• Multi-day shoots
• Multiple operators

By previewing the same LUT across sessions, you ensure similar tonal balance and contrast decisions on set.

This dramatically reduces grading time later.

 

8. Avoiding Common LUT Preview Mistakes

Do not:

• Expose based only on the preview
• Overexpose because the preview looks dark
• Underexpose because the preview looks bright
• Stack multiple LUTs

Always:

• Use waveform
• Lock white balance
• Lock ISO
• Monitor highlight levels

Preview LUTs are creative tools, not exposure tools.

 

9. Advanced Tip: Testing LUTs Before a Shoot

Before an important project:

1. Shoot test clips in different lighting
2. Preview multiple LUTs
3. Evaluate highlight behavior
4. Check skin tones
5. Confirm shadow detail

This preparation ensures you know how the LUT behaves before the real shoot.

 

Final Thoughts

Custom LUT previews inside Blackmagic Camera bridge the gap between flat Log recording and cinematic vision.

They allow you to:

• Shoot confidently
• Expose accurately
• Maintain creative consistency
• Reduce guesswork

The key is using preview LUTs responsibly: as a guide, not a shortcut.