to reproduce, open a flightline, then draw a fence on a smallish area (the bug happens at any size but is more obvious the smaller the area). then go to open and refresh the flight line with the fence selected. When the new area is coloured by height the colours will be incorrect (and the colours will change depending on what controls the brightness)

it would be good to add a scale for the distance on screen and the colour by height to lag. prefereably these would be in the main viewing window in one corner floating above the opengl drawn flight line.

they need to be togglable and easy to read against the black background and most of the colours the flightlines can be.

it has become clear that trying to automatically remove high and low out liers from the colour generation is hard and complex. therefore a better method is to allow the user to control the height range the program uses when generating colours. anything above or below this height range is defaulted to the max or min value. this allows the user to remove outliers and also choose which height cross section they want to focus on (giving them higher colour resolution in the smaller height range)

preferable a pop out window, very small, with a couple of arrow buttons and text feild. the value is capped to the highest and lowest values and the max and min can be changed indipendantly (don't forget to prevent them making the min higher than the max)