It is still subjective, but it’s the best kind of subjective - you are ranking the appearance of a test in the same way you will compare the appearance of a filament painting to the prediction.
Errm. How about automating this by analyzing a photo of the sample?
In that case no need to print on black, just take the photo with the sample on a diffuse light source. Ensure there is some zero thickness in the sample so you can calibrate the intensity and color of the light source then you can accurately set the filament color at the same time. Photos of the samples are easy to share so people could compare and confirm.
It's a good idea, but I haven't had time. I have been thinking along those lines for some time.
Errm. How about automating this by analyzing a photo of the sample?
In that case no need to print on black, just take the photo with the sample on a diffuse light source. Ensure there is some zero thickness in the sample so you can calibrate the intensity and color of the light source then you can accurately set the filament color at the same time. Photos of the samples are easy to share so people could compare and confirm.
hi i cant save the test the stl is greyed out only option is the save project?
It IS an STL. No need to save it. You just want to compare the print against the result in HueForge
What do you do if the steps in the model are not enough?
That itself is useful information. With experience, they ARE enough and you can still set a value, but if they aren't yet enough, there is a great community version you can use on Printables: https://www.printables.com/model/516863-detailed-td-calibration-step-test-for-hueforge