Hello,
Yesterday I noticed something I had not noticed before about an object with a Crumple Modifier. I reopened a file I had been working on months ago and rendered it…
Checking the newly rendered image against the previous renders from the file, I couldn't figure out why the crumpled surface in the new render was not the same as in the previous render. My first thought was that I had changed something and had not noted the change and/or had not rendered it.
There was never any animation work done with the file. Nothing is key-framed.
Longer story shorter…
To replicate the behavior in a file that is post-able, I created a simple new file.
Skylight
A Disc with a highly reflective material, a Crumple Modifier, and a Subdivision Modifier
A Sphere with a default material -- helps to show difference in disc surface
Closing and reopening the file does not result in there being any difference between the resulting renders.
However, quitting and restarting C3D make a significant difference.
The non-consistent results of the Crumple Modifier on the Disc are the same with either v7.51 or the current v8 beta.
Quitting and restarting C3D ten times results in 10 different crumpled surfaces. I have not tried quitting and restarting C3D enough to ever have a render match a previous render.
Perhaps a random seed is generated for the Crumple modifier when C3D is first started? And that random seed is not saved with the file to preserve the resulting crumple between restarting?
The resulting animation from renders after quitting and restarting C3D seems rather different than the animation results from key-framing the exposed Crumple Modifier parameters. If a random seed is being generated, it seems that would be a useful parameter to be stored in the file and then to be able to regenerate a new seed upon request.
Anyone have any insight/experience/thoughts? Is this expected behavior? Am I missing something very obvious? I’ll post the simple file if it is helpful.
thanks and cheers,
gsb
Yesterday I noticed something I had not noticed before about an object with a Crumple Modifier. I reopened a file I had been working on months ago and rendered it…
Checking the newly rendered image against the previous renders from the file, I couldn't figure out why the crumpled surface in the new render was not the same as in the previous render. My first thought was that I had changed something and had not noted the change and/or had not rendered it.
There was never any animation work done with the file. Nothing is key-framed.
Longer story shorter…
To replicate the behavior in a file that is post-able, I created a simple new file.
Skylight
A Disc with a highly reflective material, a Crumple Modifier, and a Subdivision Modifier
A Sphere with a default material -- helps to show difference in disc surface
Closing and reopening the file does not result in there being any difference between the resulting renders.
However, quitting and restarting C3D make a significant difference.
The non-consistent results of the Crumple Modifier on the Disc are the same with either v7.51 or the current v8 beta.
Quitting and restarting C3D ten times results in 10 different crumpled surfaces. I have not tried quitting and restarting C3D enough to ever have a render match a previous render.
Perhaps a random seed is generated for the Crumple modifier when C3D is first started? And that random seed is not saved with the file to preserve the resulting crumple between restarting?
The resulting animation from renders after quitting and restarting C3D seems rather different than the animation results from key-framing the exposed Crumple Modifier parameters. If a random seed is being generated, it seems that would be a useful parameter to be stored in the file and then to be able to regenerate a new seed upon request.
Anyone have any insight/experience/thoughts? Is this expected behavior? Am I missing something very obvious? I’ll post the simple file if it is helpful.
thanks and cheers,
gsb
