Make sure you are on latest ( this might not work otherwise ) . You can do that in multiple ways now. An easy way would be to use a gap file as with the below example . You can experiment with 0 for blank or -1 for missing pixels . You can also experiment with ledmaps along side a gap file if needed .
im using nodemcu v3 i flashed esp8266 then not working
i have been using pixart too but need picture i need map manualy as u said for example using 0 and 1
I have just tested that one hour ago using ledmaps and you can see the result on discord and I think it will be the best and easy way for your use case