So if you're simulating GP2 in that situation you'd want pretty much green, no? A sim should offer a reasonable range of options to simulate a reasonable range of scenarios. Having the tarmac tearing apart because of a freak 45°+ heatwave probably wouldn't be a reasonable expectation, but a 'completely' green track doesn't seem out of the question. Just because it almost never happens in a particular series doesn't mean it never happens. (this isn't aimed at you Guimengo!) Still, a bit of rubber on the kerbs doesn't seem a big deal either way. There's really no reason for it to be. A number (ok, at least one... I haven't looked at many...!) of ISI tracks have a lightly rubbered preset, and any track is able to provide a large number of presets so you don't start with a fully green track. It's really easy to do for a track maker because in Devmode you can manually set all realroad surfaces to a particular percentage of rubber, then save that to file as a starting point. So when visiting a race track that probably gets an amount of running between visits by the series you're simulating you can put a layer of rubber down everywhere (~30% I find ok), and then run some AI around it for a few laps on accelerated realroad so you get a bit of a race line rubbering in as well. Again it all depends on the series you're doing as to what suits, but it really should be normal practice for track makers to provide some varying presets and completely avoid the 'green offline' problem. Also more recent versions of ISI tyres have had a lower grip boost from rubber, reducing this effect somewhat.