Question
Is mukthi possible from world’s other than bhuloka(ie. From swarga and naraka)
Answer
As I discussed in this answer, according to Vedanta, the only way to attain Moksha is to realize Brahman.
वेदाहमेतं पुरुषं महान्त- मादित्यवर्णं तमसः परस्तात् ।
तमेव विदित्वातिमृत्युमेति नान्यः पन्था विद्यतेऽयनाय ॥ ८॥III-8: I have realized this Great Being who shines effulgent like the sun beyond all darkness. One passes beyond death only on realizing Him. There is no other way of escape from the circle of births and deaths.
Now one can only know and realize Brahman in either this loka or Brahma Loka. That's why it's recommended to try to know & realize Brahman in this loka before death.
इह चेदशकद्बोद्धुं प्राक्षरीरस्य विस्रसः ।
ततः सर्गेषु लोकेषु शरीरत्वाय कल्पते ॥ ४॥2-III-4. If one could know here prior to the falling of the body, (one becomes liberated); (if not), one becomes fit to be embodied in the worlds of creatures.
If he is able to know and knows even during life, this Brahman} the cause of fear, before the falling of the body, then he becomes freed from the bond of Samsâra. If he is not able to know, then, i.e., from want of that knowledge, he becomes able to take, i.e., he takes a body in earth and other worlds, where those who are fit to be created, are created. Therefore, before the falling of the body, attempt should be made to realise the âtman; for the realisation of the âtman even here will be clearly horrible as that of a face reflected in a mirror; not in other worlds except the Brahmalôka; and that is hard to reach.
And it's only possible in either this loka or in BrahmaLoka
यथाऽऽदर्शे तथाऽऽत्मनि यथा स्वप्ने तथा पितृलोके । यथाऽप्सु परीव ददृशे तथा गन्धर्वलोके छायातपयोरिव ब्रह्मलोके ॥ ५॥
2-III-5. As in a mirror, so in one's intellect; as in a dream, so in the world of manes; as seen in water, so in the world of the Gandharvas; as in the case of shade and light, so in the world of Brahma.
Adi Shankraracharya's Bhashya:
How is explained. As one in the world sees his own image reflected in a mirror very distinctly, so the realisation of the âtman in one's intelligence, when spotless like a mirror, becomes clear. As in dreams, the perception is indistinct and produced, i.e., (obscured) by the reminiscences of the waking state, so indistinct is the realisation of the âtman in the world of the manes, being engrossed in the enjoyment of the fruits of karma. As the image of one's self reflected in water is seen indistinctly, with the various parts not defined, so is the realisation of the âtman in the world of the Gandharvâs certainly indistinct. Thus, it is inferred from the authority of the sâstrâs, even in other worlds, it is only in one, the Brahmalôka, that it is very distinct, as that of light and shadow and that (Brahmalôka) is hard to attain requiring as means, a combination of very special karma and knowledge, i.e., (worship). The drift, therefore, is that one should attempt to realise the âtman even while here (in this world).
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