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Technical Discussion » mantra pixel filter energy conservation
- jpparkeramnh
- 178 posts
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Ha, yes, actually for most renders I've found the Gaussian 2x2 filter to be perfectly fine.
Technical Discussion » mantra pixel filter energy conservation
- jpparkeramnh
- 178 posts
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Sure, that would work, but then my 10000 frame long render goes from 8K to 16K… the disk space horrors…
Technical Discussion » mantra pixel filter energy conservation
- jpparkeramnh
- 178 posts
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Is there a pixel filter that will conserve energy during anti-aliasing?
I'm running a post bloom filter on some objects that are close to pixel sized and the bloom effect is flickering because the average brightness changes as the object moves across the screen, due to aliasing.
Cheers,
Jon
I'm running a post bloom filter on some objects that are close to pixel sized and the bloom effect is flickering because the average brightness changes as the object moves across the screen, due to aliasing.
Cheers,
Jon
Technical Discussion » Motion Vector pass for Spherical render
- jpparkeramnh
- 178 posts
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Ah, cool, guess I was overthinking that part… which was what held me back from doing the same solution.
Technical Discussion » Motion Vector pass for Spherical render
- jpparkeramnh
- 178 posts
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Technical Discussion » Motion Vector pass for Spherical render
- jpparkeramnh
- 178 posts
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jsmack,
Thanks! I was about 90 percent of the way towards exactly what you posted but never got a chance to test it. Still don't have time to test it… give it a whirl Alessandro!
Thanks! I was about 90 percent of the way towards exactly what you posted but never got a chance to test it. Still don't have time to test it… give it a whirl Alessandro!
Technical Discussion » Motion Vector pass for Spherical render
- jpparkeramnh
- 178 posts
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Houdini Lounge » RFEs voting
- jpparkeramnh
- 178 posts
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Houdini Lounge » [Apprentice][Sound] - Spatial Audio engine documentation
- jpparkeramnh
- 178 posts
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Technical Discussion » math q: director vector to spherical coords
- jpparkeramnh
- 178 posts
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Technical Discussion » math q: director vector to spherical coords
- jpparkeramnh
- 178 posts
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I'm not sure…
Direction vectors must be treated differently when doing a space transformation, so I assumed that applied to this as well.
Direction vectors must be treated differently when doing a space transformation, so I assumed that applied to this as well.
Technical Discussion » math q: director vector to spherical coords
- jpparkeramnh
- 178 posts
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Not strictly Houdini related, just a question from the mathematically challenged…
How can I convert a direction vector from cartesian to spherical coordinates?
I know the formula for a *position* (as well as the nodes topolar and frompolar) but not a vector… it's probably something simple that I'm overlooking…
Cheers,
Jon
How can I convert a direction vector from cartesian to spherical coordinates?
I know the formula for a *position* (as well as the nodes topolar and frompolar) but not a vector… it's probably something simple that I'm overlooking…
Cheers,
Jon
Houdini Lounge » Houdini corporate usage
- jpparkeramnh
- 178 posts
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This could count as education, immersive theater or data visualization, but the current planetarium show at the American Museum of Natural History in New York was produced 90% with Houdini:
http://www.amnh.org/exhibitions/space-show/dark-universe/ [www.amnh.org]
http://www.amnh.org/exhibitions/space-show/dark-universe/ [www.amnh.org]
Technical Discussion » Passing python class objects between python sops
- jpparkeramnh
- 178 posts
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I guess you could pickle the object into a detail attribute and then decode it in another python SOP downstream. Or store the object in an external module being called by both nodes.
But if I saw that in a tool in a production studio it would definitely raise some red flags. Surely there is another method to achieve what you want that is more idiomatic to the way Houdini is designed?
Having said that I grant there are exceptions… for example, a module that loads a database of some kind that is used in a global manner.
-Jon
But if I saw that in a tool in a production studio it would definitely raise some red flags. Surely there is another method to achieve what you want that is more idiomatic to the way Houdini is designed?
Having said that I grant there are exceptions… for example, a module that loads a database of some kind that is used in a global manner.
-Jon
Technical Discussion » Shading a surface with pbrphase bsdf: issue...
- jpparkeramnh
- 178 posts
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Technical Discussion » Shading a surface with pbrphase bsdf: issue...
- jpparkeramnh
- 178 posts
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I know it's supposed to be for volumes, but…
Can one trick mantra into rendering a surface using pbrphase without it blacking out the backfacing surface?
Could I modify the henyeygreenstein CVEX shader to accomplish that?
Cheers,
Jon
Can one trick mantra into rendering a surface using pbrphase without it blacking out the backfacing surface?
Could I modify the henyeygreenstein CVEX shader to accomplish that?
Cheers,
Jon
Houdini Learning Materials » REQUEST: VEX sampling functions tutorial
- jpparkeramnh
- 178 posts
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Wow, thank you Nick, I had no idea there were so many examples on that page. It looks like a great start. I think Attribute Randomize is also relatively new and I never really think about using it, but I certainly will now! It's certainly more promising than when I usually roll my own hacky randomizing functions.
At my current job I occasionally deal with statistical distributions of data given to me by scientists, which I then use to make more general-audience appealing images from. I often need to re-synthesize a new distribution from the source data. The scientists almost certainly apply many of the same statistical distributions to their work provided by VEX, so the more I know about them the better.
Cheers,
Jon
At my current job I occasionally deal with statistical distributions of data given to me by scientists, which I then use to make more general-audience appealing images from. I often need to re-synthesize a new distribution from the source data. The scientists almost certainly apply many of the same statistical distributions to their work provided by VEX, so the more I know about them the better.
Cheers,
Jon
Houdini Learning Materials » REQUEST: VEX sampling functions tutorial
- jpparkeramnh
- 178 posts
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There have been a lot of new sampling functions added to VEX in the last couple of releases. I am no expert on statistics and would love an overview tutorial going over the sampling functions and what the various distributions might be useful for.
The docs have almost zero examples for these.
The docs have almost zero examples for these.
Technical Discussion » Mantra Transparency issue ...
- jpparkeramnh
- 178 posts
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Right, opacity is more of a screen door effect… you think you can see through something but only because the individual holes / negative space are too small to discern.
Most usable renderers make a distinction.
Most usable renderers make a distinction.
Technical Discussion » OCIO Implementation plan
- jpparkeramnh
- 178 posts
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I'm only using ACES views right now and I'm pretty happy that it's there at all.
Some functions that spit out XYZ color can now be converted to ACES, so that alone is an improvement.
Some functions that spit out XYZ color can now be converted to ACES, so that alone is an improvement.
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