Lexus’ IS line is very popular and a hot seller. The recently redesigned sedan combines futuristic, swoopy looks with typical Lexus luxury and build quality. It also has proven to be a legitimate sports sedan, besting both a BMW 335i and Cadillac ATS in independent testing. We recently reported on a possible coupe variant, and now we have a rendering of the IS C convertible update. The current IS C, while competent and classy, is a bit long in the tooth. It has been around since 2009 and, as of July 2014, hasn’t enjoyed the redesign the rest of the IS line received.