- This topic has 4 replies, 5 voices, and was last updated 13 years, 11 months ago by .
-
Posts
-
I am having some issues with garbage masks imported into Fire/Smoke that have been created in Combustion 4 on a Mac. Some of the hermite curves are broken when viewd in the Fire, and as such “spike” during animation. The same mask is smooth and has no “spiking” when viewed while playing back in Combustion. Are there things to watch out for on either platform to get consistent success with Combustion gmasks? These anomalies are also inconsistent, so we are a bit confused as why sometimes the masks are perfect, and other times thaey have these problems. I have heard the same complaints from Inferno artists as well, and from gmasks generated from different Combustion artists. It appears as though there is an interpretation of the mask data that is not translating correctly relative to the masks hermite curves.
Experienced advice appreciated!!
Make sure before you start your combustion roto, that the interpolation is set to hermite or liner other wise it will do some traslation on the export. Also you may want to check the frame rate make sure that it matches the frame rate of the clip on the flame.
Apparently the Combustion artists do check that the interpretation is set to hermite or linear, and we are still getting errors.
I was made aware today by one of our Combustion artists that this has been an ongoing issue with Combustion. A software update was recently installed, and I will see what happens after this update.This probably won’t help you, but in the past, when we used combustion, we’ve had to load the gmasks into Flame then take it from the Flame into the Smoke then it would work perfectly. Otherwise we run into problems with the masks.
Hi
I know of this problem in Flame, and this is what I discovered!
Combustion supports uneven bezier handles, i.e where one handle is longer than the other on a given point, Flame does not, so it has to break them into two points on import. This is documented in the Combustion User Reference docs. The only solution is to work in a very specific way in Combustion…when adjusting any bezier handles, make sure you hold down the ALT key and this maintains an even bezier handle which comes into Flame perfectly.
Your Roto guys may well have to go through all the work they have done and convert all the beziers to even. They just have to go through all the keyframes and readjust the handles whilst using ALT…hope it’s not too many frames!
Paul
- You must be logged in to reply to this topic.