A.T. Robertson Commentary Revelation 15:8

"And the temple was filled with smoke from the glory of God, and from his power; and none was able to enter into the temple, till the seven plagues of the seven angels should be finished." — Revelation 15:8 (ASV)

Was filled with smoke (εγεμισθη καπνου). First aorist passive indicative of γεμιζω (from γεμω), to fill full, and with the genitive καπνου (smoke). Smoke is here the symbol of God's presence (Exodus 19:18; Isaiah 6:5).

Till should be finished (αχρ τελεσθωσιν). Temporal clause for future time with αχρ (equal to εως in import) and the first aorist passive subjunctive of τελεω, a metaphorical and symbolic "smoke screen" to keep all out of the sanctuary for the time being.