need help with bluescreen

[QuentinT]

I need to make an assembly instruction. I would like to use bluscreening to hide the hands doing the assembly. for example whearing blue gloves and later use Adobe after effect to remove the hands from the finished product. can somebody please help.

 

[skootles]

ok, to do bluescreening is really easy. You just need to aply the color key effect. Then, select the blue of the hands. You may need to apply this effect more than once as there may be different shades of blue.

 

[maruyama]

Not easy! Depending on what you are trying to assemble, taking out the hands from assembly can be VERY difficult!!

If you delete the hands, there will be missing information from your product. Consider this: blue hands threading a bolt through a nut. Where one hand covers the held nut, the key will read as a matte, leaving the shape of the fingers transparent.

Unless you have shot parts to replace it, you will have strange little "bluescreen hand" shapes tearing the edges of your construction.

Better, although more difficult, production, is to build a rig that is attached to your assembly pieces from behind the subject. You can either drape them in greenscreen, or rotoscope them manually. Navigate the animation with the rig, or complete it in steps.