make sure a1 is true then you will have thermal overlay at all time.
Code:int __cdecl sub_426F80(char a1, int a2) { int result; // eax@1 byte_5F8FFC0 = a1; result = a2; if ( a2 ) dword_5F8FFC4 = a2; else dword_5F8FFC4 = dword_5F8F6E0;//glow return result; }