If I were you, I should try to do it the next way.
Find some good branch photo.
Divide it on parts.
Then, draw shape on every that should be the "glowing one".
Then, assign dash to shape, animate and distort it add wiggle, where it is needed.
Add shape to the "glowing peace" with some blending mode.
Distribute branch parts in z axis and apply depth of field and levels with wiggle to add flickering.