Help, I can not impose a texture on a certain polygon, it applies to the whole object.
I just started learning. I do everything from the video lesson but it does not work for me.
I would be very happy for your help.
Please write without abbreviations. I don’t know English language I will read through the translator. Thank you for help.

Hey there,

Your model needs to have UV or sub-materials set. Since you specify polygon, sub-materials would be the easiest option.
What application did you use to create the model?