allow constants to be passed in materials
allow constants to be passed in materials

talves/famous-engine,aug2uag/engine,infamous/engine,Famous/engine,codesdk/engine,nmai/engine,infamous/famous-engine,manyoo/engine,steveblue/engine,redwoodfavorite/engine,artichox/engine,huanghjb/engine,yummy222/engine,CedarLogic/engine,manyoo/engine,Morgantheplant/engine,avikalpa/engine,woltemade/engine,TheAlphaNerd/engine,mcanthony/engine,beni55/engine,noikiy/engine,tbossert/engine,trusktr/engine,infamous/famous-engine,redwoodfavorite/engine,Wanderfalke/engine,Bizboard/engine,Famous/engine,sonwh98/engine,infamous/engine,arunabhdas/engine,Bizboard/engine,andreaslangsays/engine,steveblue/engine,noikiy/engine,beni55/engine,TheAlphaNerd/engine,alexanderGugel/engine,trusktr/engine,talves/famous-engine,sonwh98/engine,yummy222/engine,IjzerenHein/engine,woltemade/engine,aug2uag/engine,codesdk/engine,artichox/engine,alexanderGugel/engine,avikalpa/engine,CedarLogic/engine,arunabhdas/engine,huanghjb/engine,mcanthony/engine,andreaslangsays/engine,prepare/engine,Morgantheplant/engine,tbossert/engine,nmai/engine,Wanderfalke/engine,prepare/engine,IjzerenHein/engine