I don't think it's OK to post conversions of commercial products if you don't have permission by the makers. Don't want to ruin it, I'm always happy when people put in time and effort to get us more content but I think you will get a spanking if you promote this kind of work here.
You guys with your "illegal"-Komplex! This track is antique and as you can see in the vid he is only using the track geometry to begin with. No trackside objects or so. So calm down!
There is no calming down. Any portion taken from another source without author or rights holder permission renders it illegal, therefore it should expressly not be shared on these forums. If he uses the GT4 as his inspiration and there is nothing of the original in his work - and it isn't a paid add-on - then it should be ok.
High Speed Ring (Gran Turismo 4) Starting Conversion Where did you get that from? If you read my post again you will see I am totally calm. Since I saw he is new here at the forum I just let him know about which content usually gets removed. No need to over react, if Tim thinks it's fine then I'm also fine with the track beeing promoted here.