artChromaKey{
bool:c1en
float:c1u
float:c1v
float:c1dist
float:c1slope
bool:c2en
float:c2u
float:c2v
float:c2dist
float:c2slope
bool:c3en
float:c3u
float:c3v
float:c3dist
float:c3slope
uint32_t:spill
string:imagefile
}
