Jain view in brief:

• The jiva (soul) is surrounded by subtle sheaths (kaya). Tejas sharira is the luminous, subtle body that accompanies the soul and supports its perceptual and experiential faculties.
• Vedana (feeling) arises when the soul’s inner nature experiences contact through its sensing organs and the subtle body, in response to contact with objects, beings, or events. In Jainism, this is not just physical sensation but a karmic-transformation event that affects the jiva’s current state (due to past karma) and its future rebirths.
• Mechanism in simple terms:

1) A sense organ (indriya) or the subtle sense faculty comes into potential contact with an object, object-presentation, or mental impression. 2) This contact triggers a sensation in the jiva, which is experienced as vedana (pleasant, unpleasant, or neutral). 3) The tejas sharira, as the luminous subtle body that accompanies the jiva, participates in carrying and transmitting these perceptual impressions and helps the jiva process the experience at a refined level. 4) The resulting vedana, tied to karmic particles attached to the soul, influences the jiva’s disposition and future karmic balance. This is why vedana is not merely momentary; it has ethical and spiritual implications in Jain practice (austerities, detachment, purification).

• Digambar vs. Shwetambar notes:

- Both traditions acknowledge the tejas sharira as a real, subtle aspect of the jiva and accept vedana as the jiva’s experiential contact. - There can be differences in terminology or in how precisely the subtler layers of body are described in various sutras, but the core idea—tejas sharira aiding perception and vedana arising from contact—remains common.

If you’d like, I can give a concise, traditional sutra-based description (with original wording and authenticated arth) from Jain scriptures.