Hi,
maybe you should read this:
http://www.sidefx.com/docs/houdini/render/noise [sidefx.com]
Object specific sampling is in many cases a way to reduce rendertime drastically. You can avoid oversampling of the other areas.
Lets say you want to render a car:
The car body itself needs only a few bounces etc.
The lamp might need a lot more…
And the ground shadow again needs also more to be noise free, but you might just blur/filter that away…
kind regards
Olaf
Found 296 posts.
Search results Show results as topic list.
Houdini Indie and Apprentice » How to speed up Mantra
- Olaf Finkbeiner
- 323 posts
- Offline
Technical Discussion » Mantra and deep pixel channels.
- Olaf Finkbeiner
- 323 posts
- Offline
Hi Smuseus,
he a link to a cracy project/tutorial:
http://tmdag.com/vopraytracer-pt1/ [tmdag.com]
It is a vex raytracer.
Now that you explained it in a bit more detail i would go about it by creating an image per term/objectgroup.
Transparencies and reflections will be the harder bit to deal with.
But you should include also depth(distance to camera) and transparency.
Now when testing a pixel you inspect all the available layers (one per term) from that image and get the array from that.
So one image per term makes the most sense, this keeps it flexible.
On top of that you create the beauty rendering.
greetings
Olaf
he a link to a cracy project/tutorial:
http://tmdag.com/vopraytracer-pt1/ [tmdag.com]
It is a vex raytracer.
Now that you explained it in a bit more detail i would go about it by creating an image per term/objectgroup.
Transparencies and reflections will be the harder bit to deal with.
But you should include also depth(distance to camera) and transparency.
Now when testing a pixel you inspect all the available layers (one per term) from that image and get the array from that.
So one image per term makes the most sense, this keeps it flexible.
On top of that you create the beauty rendering.
greetings
Olaf
Technical Discussion » Mantra and deep pixel channels.
- Olaf Finkbeiner
- 323 posts
- Offline
Either you need to encode this.
eg
Car = 00000001
Old = 00000010
Old and Car would be = 00000011
etc.
One bit per term
or you need to write your own output format. Even that would be possible. You could render into xml or whatever.
How many terms do you need?
Or how may terms can apply to one pixel?
How may combinations are there? Actually this would be the best approach.
First create a hash table with all combinations
But what about anti-aliasing? Is that important for you? Do you need to know if a pixel is 70% car 30% sky or so?
And maybe can i ask why you want to do this?
greetings
Olaf
Technical Discussion » Material Blending
- Olaf Finkbeiner
- 323 posts
- Offline
Hi Shasha,
this is a great tutorial on shader building…
http://www.rohandalvi.net/shader/ [rohandalvi.net]
To your question:
You could build a shader that exactly does that.
Maybe i would go about it like this:
Create a basic white shader and use it as a “mask” for the two other “materials”.
kind regards
Olaf
this is a great tutorial on shader building…
http://www.rohandalvi.net/shader/ [rohandalvi.net]
To your question:
You could build a shader that exactly does that.
Maybe i would go about it like this:
Create a basic white shader and use it as a “mask” for the two other “materials”.
kind regards
Olaf
Houdini Learning Materials » Frustration Threshold
- Olaf Finkbeiner
- 323 posts
- Offline
Hi Felix,
yes it is a lot to learn.
It took me quite a while to get the drift. I now know enough to be comfortable in Houdini.
But this is not full time learning and experimenting. Maybe something like 500 hours before i had the aha moment of - “I dont want to use any other 3d software anymore” (I used max for ages!)
I think the paid tutorials at pluralsight are great to start with. I also really like http://www.rohandalvi.net/ [rohandalvi.net] i actually think this is the best out there. BUT: there is a lot of tutorials that are great basically for everything there is great tutorials. Problem is a bit that it all comes together at some point and before that you feel lost.
About the docu: look at ALL the sample files at least once! There is a lot to learn.
some of my personal favs:
- http://www.rohandalvi.net/textures/ [rohandalvi.net]
- http://www.rohandalvi.net/shader/ [rohandalvi.net]
https://vimeo.com/41727309 [vimeo.com]
https://vimeo.com/67677051 [vimeo.com]
also have a look here
http://houdinitricks.com/category/quicktips/ [houdinitricks.com]
http://forums.odforce.net/ [forums.odforce.net]
there is a paid very new course on wrangle: https://www.sidefx.com/tutorials/creating-custom-solvers-with-vex-wrangles/ [sidefx.com]
greetings
Olaf
yes it is a lot to learn.
It took me quite a while to get the drift. I now know enough to be comfortable in Houdini.
But this is not full time learning and experimenting. Maybe something like 500 hours before i had the aha moment of - “I dont want to use any other 3d software anymore” (I used max for ages!)
I think the paid tutorials at pluralsight are great to start with. I also really like http://www.rohandalvi.net/ [rohandalvi.net] i actually think this is the best out there. BUT: there is a lot of tutorials that are great basically for everything there is great tutorials. Problem is a bit that it all comes together at some point and before that you feel lost.
About the docu: look at ALL the sample files at least once! There is a lot to learn.
some of my personal favs:
- http://www.rohandalvi.net/textures/ [rohandalvi.net]
- http://www.rohandalvi.net/shader/ [rohandalvi.net]
https://vimeo.com/41727309 [vimeo.com]
https://vimeo.com/67677051 [vimeo.com]
also have a look here
http://houdinitricks.com/category/quicktips/ [houdinitricks.com]
http://forums.odforce.net/ [forums.odforce.net]
there is a paid very new course on wrangle: https://www.sidefx.com/tutorials/creating-custom-solvers-with-vex-wrangles/ [sidefx.com]
greetings
Olaf
Houdini Lounge » PC Build 2016
- Olaf Finkbeiner
- 323 posts
- Offline
Hi Rob,
do you run it with 128gb ram?
on intels website the max ram is quoted at 64gb.
I cant find any info on this working.
My motherboard has 8 slots but states that the 128gb is only possible if i use a xeon.
Do you have more info on this?
Olaf
do you run it with 128gb ram?
on intels website the max ram is quoted at 64gb.
I cant find any info on this working.
My motherboard has 8 slots but states that the 128gb is only possible if i use a xeon.
Do you have more info on this?
Olaf
Houdini Learning Materials » UV Texture vs UV Projection
- Olaf Finkbeiner
- 323 posts
- Offline
There are quite a few differences between the two nodes.
uvtexture has quite a few texture types that you dont have in uvproject.
“Perspective from camera” is quite usefull sometimes, only in UV texture
uvtexture has quite a few texture types that you dont have in uvproject.
“Perspective from camera” is quite usefull sometimes, only in UV texture
Technical Discussion » How making this Weird Effect ?
- Olaf Finkbeiner
- 323 posts
- Offline
Hi Jack,
this is not a plug and play effect.
hint you have to think backwards. So you actually destroy the shape. You can use helper objects that controll which points are affected at what time.
Basically you have to learn houdini…
have a look here: http://forums.odforce.net/topic/24056-learning-vex-via-animated-gifs-bees-bombs/ [forums.odforce.net]
kind regards
Olaf
this is not a plug and play effect.
hint you have to think backwards. So you actually destroy the shape. You can use helper objects that controll which points are affected at what time.
Basically you have to learn houdini…
have a look here: http://forums.odforce.net/topic/24056-learning-vex-via-animated-gifs-bees-bombs/ [forums.odforce.net]
kind regards
Olaf
Houdini Lounge » PC Build 2016
- Olaf Finkbeiner
- 323 posts
- Offline
Hi,
depending on what you want to do with Houdini, 64GB ram could be a bottleneck.
If you plan to do slightly bigger simulations water etc.
With xeons you dont have this restriction.
I have a system similar to your configuration (64gb ram i7) and i hit the 64gb restriction all the time.
And i only goof around with water sims…
kind regards
Olaf
depending on what you want to do with Houdini, 64GB ram could be a bottleneck.
If you plan to do slightly bigger simulations water etc.
With xeons you dont have this restriction.
I have a system similar to your configuration (64gb ram i7) and i hit the 64gb restriction all the time.
And i only goof around with water sims…
kind regards
Olaf
Technical Discussion » help using bitmaps to generate models
- Olaf Finkbeiner
- 323 posts
- Offline
Hi Breht,
maybe you should first learn houdini before trying something this specific.
If you are into volumes and want to learn about volumes you will find a lot of tutorials etc.
http://www.tokeru.com/cgwiki/index.php?title=HoudiniVolumes [tokeru.com]
Have Fun
Olaf
maybe you should first learn houdini before trying something this specific.
If you are into volumes and want to learn about volumes you will find a lot of tutorials etc.
http://www.tokeru.com/cgwiki/index.php?title=HoudiniVolumes [tokeru.com]
Have Fun
Olaf
Technical Discussion » Compute mass
- Olaf Finkbeiner
- 323 posts
- Offline
Hi A-OC,
sorry but this is not enough info to answer this question.
Best would be to post the scene file. Or even better create a special scene file that demonstrates what you want to do…
I dont get it…
I would say what you want to do can be done, because EVERYTHING can be done in HOUDINI…
O
sorry but this is not enough info to answer this question.
Best would be to post the scene file. Or even better create a special scene file that demonstrates what you want to do…
I dont get it…
I would say what you want to do can be done, because EVERYTHING can be done in HOUDINI…
O
Houdini Engine for Unreal » BAKE PROCEDURALLY ANIMATED CLONES TO TEXTURE AND IMPORT INTO UNREAL ENGINE
- Olaf Finkbeiner
- 323 posts
- Offline
You would need to create and assign a “shader” that reads out the attribute colours and bake the textures of the objects.
O
O
Houdini Lounge » Where to submit new site/forum feedback and issues?
- Olaf Finkbeiner
- 323 posts
- Offline
Technical Discussion » How to apply low res sim to high res geo?
- Olaf Finkbeiner
- 323 posts
- Offline
Hi there,
is this what you are looking for?
Embed highres object shelf tool
Lets you simulate a low-resolution solid object and apply the results to high-resolution geometry.
See embedding high-res solids for more information.
This tool works by modifying the geometry networks and changing parameters on the Solid object's Geometry tab.
http://www.sidefx.com/docs/houdini15.0/shelf/embedhighresobject [sidefx.com]
kind regards
Olaf
is this what you are looking for?
Embed highres object shelf tool
Lets you simulate a low-resolution solid object and apply the results to high-resolution geometry.
See embedding high-res solids for more information.
This tool works by modifying the geometry networks and changing parameters on the Solid object's Geometry tab.
http://www.sidefx.com/docs/houdini15.0/shelf/embedhighresobject [sidefx.com]
kind regards
Olaf
Technical Discussion » Tranfer Fuel!
- Olaf Finkbeiner
- 323 posts
- Offline
to get help you should:
attach a scene and explain exactly what you want to do.
best have screenshots and a example scene with your problem.
Your question is not to be understood otherwise.
People here like to help but ponly if you put efford into askeing a proper question.
What is “fuel”? A parameter you invented? What are you doing?
kind regards
Olaf
attach a scene and explain exactly what you want to do.
best have screenshots and a example scene with your problem.
Your question is not to be understood otherwise.
People here like to help but ponly if you put efford into askeing a proper question.
What is “fuel”? A parameter you invented? What are you doing?
kind regards
Olaf
Houdini Learning Materials » Learning 3d animation from the beginning - HELP
- Olaf Finkbeiner
- 323 posts
- Offline
Hey Lars,
yes it is. If you are a tech person Houdini is the best 3d software to start with.
But if you more like an artist person that hates math, i would recommend modo or even something like mudbox.
yes it is. If you are a tech person Houdini is the best 3d software to start with.
But if you more like an artist person that hates math, i would recommend modo or even something like mudbox.
Houdini Learning Materials » Learning 3d animation from the beginning - HELP
- Olaf Finkbeiner
- 323 posts
- Offline
The Houdini Documentation is great but cumbersome.
There is loads of example files. Now with sticky nodes that have been added.
BUT: Houdini is missing a step by step guide. For that there is digital tutors.
I would not recommend Houdini to every one new to 3d.
My question would be:
Do you want to learn scripting? Do you like programming?
If yes Houdini is for you if not go for something else.
If you dont know, try Houdini there is a free learing edition and whatever you learn will also help in another package.
Also there is so much cool stuff you can do with the shelf tools: fire, water, smoke etc. For some that might be what gets them hooked.
my 2 cents
Olaf
There is loads of example files. Now with sticky nodes that have been added.
BUT: Houdini is missing a step by step guide. For that there is digital tutors.
I would not recommend Houdini to every one new to 3d.
My question would be:
Do you want to learn scripting? Do you like programming?
If yes Houdini is for you if not go for something else.
If you dont know, try Houdini there is a free learing edition and whatever you learn will also help in another package.
Also there is so much cool stuff you can do with the shelf tools: fire, water, smoke etc. For some that might be what gets them hooked.
my 2 cents
Olaf
Houdini Lounge » Recommended GPU / Processor / etc for Houdini?
- Olaf Finkbeiner
- 323 posts
- Offline
Tip1:
Get a lot of ram!
Depending on what you want to do you will need a lot of ram.
And i guess it water, smoke etc. If so you cant have enough ram.
i have 64gb and i max out!
So for your budget you have a tough decision to make:
XEON or not?
With an i7 you only get up to max 64GB, but you get a fast maschine for less money.
But i would go for something like this if i had the +2k$:
970gtx 350$
xeon 2011-3 8 core 2.6 Ghz 6-800$ ?
64gb of ram 400$ ddr4 ecc
motherboard 2011-3 250$
case, power, hds etc: ?
This way you will be able to upgrade the ram at a later stage when you know 64 gb is not enough… Maybe if you shop around you might even be able to get 128gb within your budget.
I was on a tighter budget so i got the i7…
kind regards
Olaf
Get a lot of ram!
Depending on what you want to do you will need a lot of ram.
And i guess it water, smoke etc. If so you cant have enough ram.
i have 64gb and i max out!
So for your budget you have a tough decision to make:
XEON or not?
With an i7 you only get up to max 64GB, but you get a fast maschine for less money.
But i would go for something like this if i had the +2k$:
970gtx 350$
xeon 2011-3 8 core 2.6 Ghz 6-800$ ?
64gb of ram 400$ ddr4 ecc
motherboard 2011-3 250$
case, power, hds etc: ?
This way you will be able to upgrade the ram at a later stage when you know 64 gb is not enough… Maybe if you shop around you might even be able to get 128gb within your budget.
I was on a tighter budget so i got the i7…
kind regards
Olaf
Technical Discussion » How to Use an object to drive another object in vex
- Olaf Finkbeiner
- 323 posts
- Offline
Hi Asche,
what do you want to do?
What do you mean by drive? deform? move?
Do you mean one point is moveing and loads of points should follow?
Maybe you have to explain abit more to get an answer…
kind regards
Olaf
what do you want to do?
What do you mean by drive? deform? move?
Do you mean one point is moveing and loads of points should follow?
Maybe you have to explain abit more to get an answer…
kind regards
Olaf
Technical Discussion » Dirtmask with displacement
- Olaf Finkbeiner
- 323 posts
- Offline
Hi Werner,
Maybe you could have “two” objects (or a copy) and transfer/use the occlusion from one to displace another.
Grüße
Olaf
Maybe you could have “two” objects (or a copy) and transfer/use the occlusion from one to displace another.
Grüße
Olaf
-
- Quick Links