Add portal example using the stencil buffer
Add portal example using the stencil buffer

MicroWorldwide/PlayCanvas,sereepap2029/playcanvas,playcanvas/engine,H1Gdev/engine,sereepap2029/playcanvas,guycalledfrank/engine,sereepap2029/playcanvas,MicroWorldwide/PlayCanvas,H1Gdev/engine,guycalledfrank/engine,aidinabedi/playcanvas-engine,aidinabedi/playcanvas-engine,playcanvas/engine