Tips: Change PV3D material at runtime

If you want to replace a material-list or just a material from a rendered object at runtime, you might have tried to remove the old material by the new instance like this:

myObj.materials = myNewMaterialsList;

Unfortunately, that doesn’t work (in PV3d 1, fixed by v2 if I’m not wrong) An other way to proceed is to use bitmapMaterial and bitmapData.
You just have to create a BitmapMaterial with a bitmapData inside:

var bd1:BitmapData=new BitmapData(100, 100, false, 0xFFFFFF);
var material2:BitmapMaterial = new BitmapMaterial(bd1);
material2.name="faceToSwitch"

Then, swap the targeted material (alreday rendered) at runtime, on rollover action for example, simply by calling:

var bd2:BitmapData=new BitmapData(100, 100, false, 0x000000);
myObj.materials.getMaterialByName("faceToSwitch").bitmap = bd2;