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Your problem is that you write double vales to int. > Theory: an int is a 32bit value, thus it can hold 2^32 different values, a double is double an in thus 2^64 values. Thus, if you have a huge double int might be too small and you have "lossy conversion" > Fix: typcast the double to int. Typecasting works by butting the desired type in brackets before the expression. Here: screen = (int)(worldZ*perspective); this works since it is all just memory. Attention: you might still loose data during the conversion, but there won't be an error. An alternative way would be to check if t

it's just going left or right