This project also was a Zorba Group production. I only had one shot but is was a particularly tricky one. I had to animate some geometry to make it look like those photo reference by Lenancker ↓ in an oil like fashion since the dye the film promotes is oiled based.
The technique I used to make the shot was the following :
• Create a first super viscous smoke sim → Sim A
• Advect some particles with sim A
• Use the advected particles as sources for another super viscous smoke sim → Sim B
• Remesh both sims
• Render Sim A as Glass & Sim B as Wax
My shot, looped ↓
• Advect some particles with sim A
• Use the advected particles as sources for another super viscous smoke sim → Sim B
• Remesh both sims
• Render Sim A as Glass & Sim B as Wax
My shot, looped ↓