Hi,

If your talent appears reddish, it likely means you have increased the Despill Red/Yellow parameter too much. The effect is not linear, and usually, the optimal range is between 0.4 and 0.6. A value of 0.8 is quite high.

If your issue is that a yellow prop is being keyed out due to a high Despill Red/Yellow value, you can try to prevent this by adjusting other settings in the keyer. For a detailed explanation of the different parameters, please refer to our documentation: https://aximmetry.com/learn/virtual-production-workflow/green-screen-production/keying/keying  

Additionally, you can use the ADJUSTER panel, located next to the KEYER panel, to perform further color correction on the input.

Ensure that your camera image is not overexposed (for example, use the Zebra setting on your camera), as overexposure can lead to issues similar to what you described.

An additional screenshot showing the green background and the yellow prop would be helpful for further troubleshooting.

Warmest regards,

Hi, there are more camerashot for troubleshooting,Zebra  is checked.

When despill red comes to 0.6, the yellow tape disappears completely.  The color spill in the current environment is not obvious because this is just a green display board. However, in the actual green screen of the virtual studio, with the lighting environment as shown in the picture, the green color spill on the characters is quite obvious. If i increase the despill red/yellow to remove it, the orange chair has a significant color cast, and the yellow props will be keyed out, Sometimes i even have to reduce the despill red/yellow to keep the yellow and orange.
I used a clean plate to minimize the keying parameters, which provided some relief.  Anyway, I just want to know if there are better software solutions besides using a ultimatte-12 color keyer. 

Thanks

Hi CUC_STU,

Thanks for the extra shots and details.

Based on your screenshot, with Despill Red/Yellow set to 0.4, that yellow sticker will be affected no matter what. You might get acceptable results at 0.3, but it will be borderline.

Because this looks like spill/contamination (small studio volume + short subject-to-screen distance = lots of green bounce), the most effective fix could be physical. Increase the distance between the subject/props and the green screen as much as possible. In your setup, the seats appear very close to the back wall. Moving them farther from the rear green screen should reduce contamination.

Regarding the yellow floor poufs, they are “high risk” for spills. They will pick up a lot of contamination where they touch the green floor, and they’re also quite yellow. So they’ll be hit by despill and/or keying adjustments more easily. If the poufs won’t move during the shoot (and you have reliable tracking), you can try a Holdout Mask on them. If you’re worried about other yellow props that are even more clearly defined, a Holdout Mask may work even better for those. Documentation here: https://aximmetry.com/learn/virtual-production-workflow/green-screen-production/tracked-camera-workflow/studio-control-panel/#holdout-mask 
(I should have mentioned this earlier; we even use a yellow sticker as an example in the documentation.)

Also, your example image inside Aximmetry shows a very unevenly lit green screen. However, in your other screenshots (where the full studio is visible), the lighting looks much more even and generally well controlled.

One more concern: having multiple green screen shades in the same studio is not ideal. A 3D Clean Plate can help compensate, but the best solution is still to use greens of the same shade throughout.

If you truly need different keying behavior and want to go deeper, you can modify the keyer compound, but in most cases, it won’t produce a dramatic improvement. Another  workaround is:

Run two keyers with different settings (e.g., one optimized for skin/despill and one optimized to preserve yellow/orange),
Then blend them using a mask (for example, Mask Mixer) around the prop region.

We discuss a similar approach here: https://my.aximmetry.com/post/3738-3d-cleanplate-scanning-for-simple-set-pr   
(Note: it may be outdated depending on your Aximmetry version)

Finally, if you decide to use an external keyer (Ultimatte, etc.), Aximmetry can integrate it via Fill + Matte (External Keyer workflow): https://aximmetry.com/learn/virtual-production-workflow/green-screen-production/keying/using-aximmetry-with-an-external-keyer/ 

Warmest regards,