Sampling triangular gap near x=710..740, y=340..420:
(700,340): R=239, G=238, B=234 | (710,340): R=239, G=238, B=234 | (720,340): R=238, G=237, B=233 | (730,340): R=239, G=238, B=234 | (740,340): R=238, G=237, B=233 | 
(700,350): R=238, G=237, B=232 | (710,350): R=238, G=237, B=233 | (720,350): R=237, G=236, B=232 | (730,350): R=239, G=238, B=234 | (740,350): R=239, G=238, B=234 | 
(700,360): R=238, G=237, B=233 | (710,360): R=238, G=237, B=233 | (720,360): R=237, G=236, B=232 | (730,360): R=237, G=236, B=232 | (740,360): R=237, G=236, B=232 | 
(700,370): R=238, G=237, B=233 | (710,370): R=237, G=236, B=232 | (720,370): R=237, G=236, B=232 | (730,370): R=237, G=236, B=232 | (740,370): R=237, G=236, B=232 | 
(700,380): R=236, G=235, B=231 | (710,380): R=237, G=236, B=232 | (720,380): R=236, G=235, B=231 | (730,380): R=237, G=236, B=232 | (740,380): R=237, G=236, B=232 | 
(700,390): R=236, G=235, B=231 | (710,390): R=236, G=235, B=231 | (720,390): R=236, G=235, B=231 | (730,390): R=237, G=236, B=232 | (740,390): R=237, G=236, B=232 | 
(700,400): R=234, G=233, B=229 | (710,400): R=235, G=234, B=230 | (720,400): R=236, G=235, B=231 | (730,400): R=236, G=235, B=231 | (740,400): R=237, G=236, B=232 | 
(700,410): R=234, G=233, B=229 | (710,410): R=236, G=235, B=231 | (720,410): R=235, G=234, B=230 | (730,410): R=236, G=235, B=231 | (740,410): R=236, G=235, B=231 | 
(700,420): R=234, G=233, B=229 | (710,420): R=235, G=234, B=230 | (720,420): R=234, G=233, B=229 | (730,420): R=235, G=234, B=230 | (740,420): R=236, G=235, B=231 |