We seem to be running into an issue here with all of our candle simulations in Phoenix 5 using Corona. We’re are simply trying to add a candle simulation to our scene but whenever we render it, either the flame gets cut off or it is being stretched. We’ve tried increasing the adaptive grid and adjusting a few other values but whatever we do, it still remains distorted - even with default values using the “setup a candle sim for the selected object” option.
I’ve attached a link to some images that shows what I mean - you can see that in the viewport the candle appears normal but when you render it, the flame is extremely stretched:
Hi, please submit a new support ticket here: https://support.chaos.com/hc/en-us/requests/new
Then share your ticket number here. We will make sure that Corona team + Phoenix team assist you together.
I have discussed this issue with one of our Phoenix gurus and here is the explanation:
Due to the way Corona currently handles volumetric opacity, the candle simulation will render differently in Corona than in V-Ray, even with the default setup.
In order to match the render result to the viewport preview in your case, you can:
Select your Phoenix object, go to its Rendering rollout, click “Volumetric Options…” and in the pop-up window change “Fire Opacity Mode” to “Use Own Opacity”.
Then use the Curve below to adjust the flame appearance to your needs
