Hey Luis,
Here is the links to the scene file, SD file, and the Initial State bin file from the first shot in my project where the trouble started.
The Viscosity, Initital State problem is documented here...
http://www.realflow.com/forum/viewtopic ... 91&start=0
The only time the problem seems to occur is when I use an initial state. That's a big problem for the nature of my shot I need to use a series of initial states to keep the coverage of the mesh in the SD consistent.
http://www.mediafire.com/?ekleck4cyrzrt
I've sent you a private message for with more details. I hope this will help you guys figure out either what's wrong with the software, or what I'm doing wrong.
Thanks in advance,
Scene files for Viscosity-Initial State Bug
Re: Scene files for Viscosity-Initial State Bug
Well, I just downloaded the installed the latest patch and still no go. I'm still not getting the viscosity I want! 
Can anybody please tell me why this does not work? Is this a bug, or am I doing something wrong? I realize I only have the Learning Edition so I'm not your highest priority customer, but when you pay money for a piece of software, it should at least do what it claims it will do.
Can anybody please tell me why this does not work? Is this a bug, or am I doing something wrong? I realize I only have the Learning Edition so I'm not your highest priority customer, but when you pay money for a piece of software, it should at least do what it claims it will do.
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LuisMiguel
- Posts: 528
- Joined: Fri Jun 04, 2010 2:37 pm
Re: Scene files for Viscosity-Initial State Bug
Hi,
We have tried the viscosity scene and it was working for us. We did some test more about this and for all scenes with viscosity the result was the same. Could you tell me what process you do to simulate the scene?
luisM.
We have tried the viscosity scene and it was working for us. We did some test more about this and for all scenes with viscosity the result was the same. Could you tell me what process you do to simulate the scene?
luisM.
Re: Scene files for Viscosity-Initial State Bug
Hi Luis,
Not sure what you mean by process. I import the SD file, I add the emitter and the daemons, I set the values in gravity, k_volume, and k_speed, I set the collision distance, sticky, particle friction, and roughness in Particle Fluid Interactions for each piece of geometry. I set scale to 25 and the emitter to have a viscosity of 200 with a surface tension 200-333.
The only thing I can think of that is unusual is the way I use the initial state. This is for a project with a series of 10 shots. In order to keep the coverage of the girl the same from shot to shot, I use the last frame from one shot as the initial state for the next shot.
The shot above is 4th shot. The three previous shots have been working without too much trouble. I've even done a "File Save As" to make sure as many settings as possible are exactly the same. For a while, it only seemed to be happening with 2013, but its doing it in 2012 too now.
What else do I need to do? Help!
Not sure what you mean by process. I import the SD file, I add the emitter and the daemons, I set the values in gravity, k_volume, and k_speed, I set the collision distance, sticky, particle friction, and roughness in Particle Fluid Interactions for each piece of geometry. I set scale to 25 and the emitter to have a viscosity of 200 with a surface tension 200-333.
The only thing I can think of that is unusual is the way I use the initial state. This is for a project with a series of 10 shots. In order to keep the coverage of the girl the same from shot to shot, I use the last frame from one shot as the initial state for the next shot.
The shot above is 4th shot. The three previous shots have been working without too much trouble. I've even done a "File Save As" to make sure as many settings as possible are exactly the same. For a while, it only seemed to be happening with 2013, but its doing it in 2012 too now.
What else do I need to do? Help!
Re: Scene files for Viscosity-Initial State Bug
Hey Luis,
An interesting developement. I've been trying to get this thing working for weeks and weeks, and could not understand why the viscosity would work with simple scene without a Initital State, but would not work in my scene. Well, after rebuilding the scene countless times to see if there was something I was doing wrong, I tried something that should not have worked, but I tried it anyway simply because I could think of nothing else.
When I was re-building my scene, I would rename the Circle Emitter to fit my scene and organize things. This time, I decided not to rename the emitter, keeping the default name circle01, and low and behold, it WORK!!!!!
One other thing I did was changed the way I set up the scene. Normally, when filling a large container with particles, I keep the viscosity at 3 for it would fill up the container faster. This time, I set the viscosity at 200 where I wanted it and filled it that way. It took longer to fill, but the viscosity stayed where I wanted it so it was wortht the wait.
I'm not sure if it was one or a combination of both of these changes that made the difference. I still don't completely understand what triggers this problem, but I think this is an important clue.
For now, it seems to be working, but I've been fooled before. Despite your running my scene file from above and not finding a problem, I still think there's an issue here. I'll keep you posted.
Thanks for all your help,
An interesting developement. I've been trying to get this thing working for weeks and weeks, and could not understand why the viscosity would work with simple scene without a Initital State, but would not work in my scene. Well, after rebuilding the scene countless times to see if there was something I was doing wrong, I tried something that should not have worked, but I tried it anyway simply because I could think of nothing else.
When I was re-building my scene, I would rename the Circle Emitter to fit my scene and organize things. This time, I decided not to rename the emitter, keeping the default name circle01, and low and behold, it WORK!!!!!
One other thing I did was changed the way I set up the scene. Normally, when filling a large container with particles, I keep the viscosity at 3 for it would fill up the container faster. This time, I set the viscosity at 200 where I wanted it and filled it that way. It took longer to fill, but the viscosity stayed where I wanted it so it was wortht the wait.
I'm not sure if it was one or a combination of both of these changes that made the difference. I still don't completely understand what triggers this problem, but I think this is an important clue.
For now, it seems to be working, but I've been fooled before. Despite your running my scene file from above and not finding a problem, I still think there's an issue here. I'll keep you posted.
Thanks for all your help,
-
LuisMiguel
- Posts: 528
- Joined: Fri Jun 04, 2010 2:37 pm
Re: Scene files for Viscosity-Initial State Bug
Hey,
Changing the name doesn't make sense. Maybe it was the way to make the setup and it is probably the cause so the viscosity was not working. Also, if the scene was an older scene, it might be that the scene had something which was corrupt.
Let me know if you reproduce again the problem.
Thanks.
luisM.
Changing the name doesn't make sense. Maybe it was the way to make the setup and it is probably the cause so the viscosity was not working. Also, if the scene was an older scene, it might be that the scene had something which was corrupt.
Let me know if you reproduce again the problem.
Thanks.
luisM.
Re: Scene files for Viscosity-Initial State Bug
Hey Luis,
You're right. I does not make sense. As I said above, it should not have worked.
It could have some thing to do with old files, but that does not explain why it worked sometimes, and not others.
Another thing I did was not use the initial state funtion within Real Flow. Instead, I copied the last frame of the previous shot over to the Particles folder of the new shot. I started to simulate with the settings I wanted (200 V, 200 Sub Steps) and generated the first frame (Frame 0). I then deleted frame 0 and renamed the copied bin file to frame 0. This makes me wonder is there is something in the Real Flow scene file that saves the information on a deeper level than just the numbers in the settings. The problem seems to be related to using a low viscosity setting when you set things up, then changing the viscoisty for when you want to simulate. It's the changes that the program does not seem to like.
Anyway, it seems to be working. I just finished simulating out Shot 4 this morning. When I get home from work tonight, I'll try all these techniques on Shot 5 and hope for the best. I'll keep you posted.
You're right. I does not make sense. As I said above, it should not have worked.
It could have some thing to do with old files, but that does not explain why it worked sometimes, and not others. Another thing I did was not use the initial state funtion within Real Flow. Instead, I copied the last frame of the previous shot over to the Particles folder of the new shot. I started to simulate with the settings I wanted (200 V, 200 Sub Steps) and generated the first frame (Frame 0). I then deleted frame 0 and renamed the copied bin file to frame 0. This makes me wonder is there is something in the Real Flow scene file that saves the information on a deeper level than just the numbers in the settings. The problem seems to be related to using a low viscosity setting when you set things up, then changing the viscoisty for when you want to simulate. It's the changes that the program does not seem to like.
Anyway, it seems to be working. I just finished simulating out Shot 4 this morning. When I get home from work tonight, I'll try all these techniques on Shot 5 and hope for the best. I'll keep you posted.