C4D render background 'colour burned' into texture.
Hand drawn plate track matte to stencil texture out of BG
Hand drawn plate composited
'Object buffer' rendered matte to mask hand drawn plate and show texture through
Duplicate of the background and object buffer used again but inverted to mask out everything but the tree. The previous step allows this layer to be colour burned to retain the look of the rest of the background without unwanted transparency/blending with the character
Hand drawn plate track matte to stencil texture out of BG
Hand drawn plate composited
'Object buffer' rendered matte to mask hand drawn plate and show texture through
Duplicate of the background and object buffer used again but inverted to mask out everything but the tree. The previous step allows this layer to be colour burned to retain the look of the rest of the background without unwanted transparency/blending with the character