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Old 05 May 2015   #1951
Originally Posted by zoubein: I got this tip from Bobo once it worked quite well for my project.

You could add a Magma modifier to each PRT Loader and set a custom channel (e.g. Mapping2) to the color you want. Then in the Render Elements, create a Custom Render Element and connect its output to inputChannel Mapping2. This will give you the color set in the PRT Loader's Magma written to a render element. There is no other way to determine what object a particle came from, you have to tag them within the PRT Loader itself using Magma...


When i use this method i reciev solid color in render element. But i need element contain beauty pass for prt loader. Its can get with magma?
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Old 09 September 2015   #1952
Hello guys,
quick question. it's possible to render point position pass ?
 
Old 09 September 2015   #1953
In custom render element put position to color
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Old 09 September 2015   #1954
Originally Posted by tamagochy: In custom render element put position to color


thank you )
 
Old 12 December 2015   #1955
Hi, my matte object contain a vray displacement mod...how can I obtain right (displaced) borders on matte mask?
Again, are scattered objects (like trees in multiscatter or forest) well read from matte mask?
Thanks.
 
Old 12 December 2015   #1956
I don't think you can get the rendertime displacement, unfortunately.

The scattered objects - should work if they create a max mesh at rendertime, but probably not, if they are vray meshes.
 
Old 12 December 2015   #1957
PRT export fron houdini

Did anybody try this?
Have you been successful?

Last edited by boumay : 12 December 2015 at 05:20 AM.
 
Old 12 December 2015   #1958
Originally Posted by Glacierise: I don't think you can get the rendertime displacement, unfortunately.

The scattered objects - should work if they create a max mesh at rendertime, but probably not, if they are vray meshes.


One and half bad news at once...good starting sunday, however thanks Hristo for fast reply.

I'll try to solve with depth + id color masks but I'm a bit puzzled about some Krakatoa (in)capabilities.
 
Old 12 December 2015   #1959
Originally Posted by savat: Hi, my matte object contain a vray displacement mod...how can I obtain right (displaced) borders on matte mask?
Again, are scattered objects (like trees in multiscatter or forest) well read from matte mask?
Thanks.


Back then, I've tried using the Depth Map Sequence feature of Krakatoa. All you need is a z-depth render pass from any renderer you're using.
I still have my notes just in case I forgot anything important in setting it up:

  • Render a regular z-depth pass (take note of the near/far z distance)
  • Save it as an .exr (16bit or 32bit - either)
  • Render sizes should be the same.
  • You can double the zdepth render size, and set sampling to 2 for the depth map
  • Enable both ‘Use Matte Objects’ and ‘Use Depth Map Files’ for it to work.
  • Set it to ‘Inverted Normalized Z Depth’
  • Set the near/far z the same as your zdepth pass.
  • You may also enable ‘save multiple layers’ if you want to get a render of the occluded particles (bits that were cut off by the matte). Usefull for comping in with transparent objects.


Also, I forgot the version that I was using back then.. so some things may have been changed/updated in the newer versions.

I hope this helps
 
Old 12 December 2015   #1960
Originally Posted by galagast: Back then, I've tried using the Depth Map Sequence feature of Krakatoa. All you need is a z-depth render pass from any renderer you're using....hope this helps


Hey Jeff, thanks for this tricky advise...
on the thinkbox forum someone spoked about that but as a finished tool inside Krakatoa MX and not present in maya version...now is clear that is a workaround
 
Old 12 December 2015   #1961
Ok, Hristo (for scattered mesh) and Jeff (for real displace matte)...you solved my problem, thanks again.
Now I'm starting with other issues like krakatoa flickering...but this is another story
 
Old 03 March 2016   #1962
Magma shortcuts

Hi,

I can't get to work Magma shortcuts. I tried on/off max shortcuts override toggle, nothing.Whenever I have an already existing shortcut in max Magma is ignoring own shortcuts.

What do I do to make Magma use shortcuts and ignore max shortcuts?

Last edited by Juzwa : 03 March 2016 at 12:07 PM.
 
Old 05 May 2016   #1963
per point random value

Hi,

I cannot find a node that does the per-point random calc. So I guess this has to be done manually. How can I do that? Input script (random -value +value) gives one same value for all points.
 
Old 05 May 2016   #1964
Originally Posted by Juzwa: Hi,

I cannot find a node that does the per-point random calc. So I guess this has to be done manually. How can I do that? Input script (random -value +value) gives one same value for all points.


Ok found that there is an input channel called RandomValue. Somehow it does not work, errors out. It looks like its actually looking for an actual channel called RandomValue. So I have to recache anyways... ;(
 
Old 05 May 2016   #1965
Originally Posted by Juzwa: Ok found that there is an input channel called RandomValue. Somehow it does not work, errors out. It looks like its actually looking for an actual channel called RandomValue. So I have to recache anyways... ;(


See my answer in your duplicate post one forum higher.
http://forums.cgsociety.org/showthr...f=206&t=1360866
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