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Technical Discussion » Multiple UVs
- Grendizer
- 375 posts
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Technical Discussion » Share materials between scenes?
- Grendizer
- 375 posts
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Is it better to create an HDA for each material or one big HDA for all custom materials?
Technical Discussion » Help for understanding $ and @ in variables
- Grendizer
- 375 posts
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Technical Discussion » Understanding the "Move Center To Pivot" button
- Grendizer
- 375 posts
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Hi,
I was having a hard time understanding why the “move center to pivot” button did not seem to work. After some tests and brainstorming, it all became clear. I put my conclusions in the linked video, please tell me if it seems correct and what do you think. Cheers.
Gz
I was having a hard time understanding why the “move center to pivot” button did not seem to work. After some tests and brainstorming, it all became clear. I put my conclusions in the linked video, please tell me if it seems correct and what do you think. Cheers.
Gz
Technical Discussion » how can i use batch render?
- Grendizer
- 375 posts
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Hello is it possible to have a cmd file that contains “hscript”?
If I type each command in “Command Line tools”, it works.
But I tried to create a render.cmd file that contains:
This does not work. The command prompt just says : “hbatch Version blah blah (Compiled on blah)”. Then nothing happens.
Thanks,
Gz
If I type each command in “Command Line tools”, it works.
But I tried to create a render.cmd file that contains:
hscript mread my_scene.hip render -V –f 1 100 /out/mantraHQ
Thanks,
Gz
Edited by Grendizer - 2018年9月8日 08:19:21
Technical Discussion » per object render quality
- Grendizer
- 375 posts
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Hello, which node should I add to an object to set lower pixel samples on this object?
Is it in the Geometry level?
Is it in the Geometry level?
Technical Discussion » The faces I want to add to a group are hidden by the existing selection
- Grendizer
- 375 posts
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Hey Rob, thanks a lot for taking the time to help through this pic and scene file. MUCH apreciated!
I didn't know two groups could have the same name and I didn't pay attention to this “initial merge” menu.
Soo your experience is very helpful :0)
Just now I found another solution that is very simple. It is so simple that perhaps I overlooked it. Here is what I did:
- Select outside primitive faces.
- Create Group1 from this selection.
- Use a Visibility node to hide Group1.
- Select inside primitive faces.
- Create Group2 from this selection.
- In group 2, copy the list of primitives.
- In group 1, go to the end of the list of primitives, add a space, then paste.
- Delete the visibility node and Group2.
But all these solutions are a bit too long to do, even the simple ones. In other 3D apps it's quicker. I wish Sidefx could improve this workflow. Here is what I use to do in Softimage:
- Select outside primitive faces.
- Create a cluster from this selection. A cluster is a components group.
- Hide the selected faces using hotkey “H”.
- Select inside primitive faces.
- CTRL Select the cluster.
- Menu “add selection to cluster”
I didn't know two groups could have the same name and I didn't pay attention to this “initial merge” menu.
Soo your experience is very helpful :0)
Just now I found another solution that is very simple. It is so simple that perhaps I overlooked it. Here is what I did:
- Select outside primitive faces.
- Create Group1 from this selection.
- Use a Visibility node to hide Group1.
- Select inside primitive faces.
- Create Group2 from this selection.
- In group 2, copy the list of primitives.
- In group 1, go to the end of the list of primitives, add a space, then paste.
- Delete the visibility node and Group2.
But all these solutions are a bit too long to do, even the simple ones. In other 3D apps it's quicker. I wish Sidefx could improve this workflow. Here is what I use to do in Softimage:
- Select outside primitive faces.
- Create a cluster from this selection. A cluster is a components group.
- Hide the selected faces using hotkey “H”.
- Select inside primitive faces.
- CTRL Select the cluster.
- Menu “add selection to cluster”
Technical Discussion » The faces I want to add to a group are hidden by the existing selection
- Grendizer
- 375 posts
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Hey Tanto. Here's what I did :
- Select outisde primitive faces, create a group and name it “_3d_hidden_primitives”. The faces get hidden.
- Select inside primitive faces, go to Geometry Spreadsheet, display primitives, view > only show selected. Then I can see a column reading “_3d_hidden_primitives” with all values at 0. I tried to change these values to 1, but it does not accept it: the values remain at 0.
Hello Babaj, I found the bounding box option in the group parameters pane, but I don't know what to do with it. Could you give me more info? Thanks.
Gz
- Select outisde primitive faces, create a group and name it “_3d_hidden_primitives”. The faces get hidden.
- Select inside primitive faces, go to Geometry Spreadsheet, display primitives, view > only show selected. Then I can see a column reading “_3d_hidden_primitives” with all values at 0. I tried to change these values to 1, but it does not accept it: the values remain at 0.
Hello Babaj, I found the bounding box option in the group parameters pane, but I don't know what to do with it. Could you give me more info? Thanks.
Gz
SI Users » Handle mode alignment : quick display ?
- Grendizer
- 375 posts
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Switching from parent mode to any other mode is very important when animating, so you can see which exact direction you are altering with the Graph editor. There should be a quicker way to do it.
Technical Discussion » Mantra : tips to decrease render time ?
- Grendizer
- 375 posts
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Hello
New pictures enclosed, this time only 11mn!
Render time : 11mn
Image size : 1280x720
Intel Core i7-6700 2.60Ghz
Ram : 16Gb
output picture : jpg
Rendering engine : Mantra, , physically based rendering
Depth of field and motion blur : off
Pixel samples : 3 3
Min max ray samples = 1 & 6
Reflect and refract limits = 3
Opacity limit = 0.995
What I changed : I used less hoggish materials. Previously I was using “Glass” presets. Now I changed them to principle shader with some transparency , etc.
I still have some big render times and noise on scenes with reflections in shadows, but I'm studying that now.
Thanks Rob for the extra image planes tip, it has helped me to locate where the noise was coming from in these other scens.
I also tested Redshift demo. It's true that it's quick. But so far I didn't test it extensively, I get some black and white renders. I think to get it right I have to replace all my materials and lights by Redshift ones, right?
New pictures enclosed, this time only 11mn!
Render time : 11mn
Image size : 1280x720
Intel Core i7-6700 2.60Ghz
Ram : 16Gb
output picture : jpg
Rendering engine : Mantra, , physically based rendering
Depth of field and motion blur : off
Pixel samples : 3 3
Min max ray samples = 1 & 6
Reflect and refract limits = 3
Opacity limit = 0.995
What I changed : I used less hoggish materials. Previously I was using “Glass” presets. Now I changed them to principle shader with some transparency , etc.
I still have some big render times and noise on scenes with reflections in shadows, but I'm studying that now.
Thanks Rob for the extra image planes tip, it has helped me to locate where the noise was coming from in these other scens.
I also tested Redshift demo. It's true that it's quick. But so far I didn't test it extensively, I get some black and white renders. I think to get it right I have to replace all my materials and lights by Redshift ones, right?
Edited by Grendizer - 2018年9月4日 05:30:13
Technical Discussion » The faces I want to add to a group are hidden by the existing selection
- Grendizer
- 375 posts
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Hello Rob, many thanks for the useful tips. These will come in handy next time I have to select merged multi parts objects.
However, I'd like to know how to handle the specific case I'm showing on the video, when a selection group hides other primitive faces I want to add to the selection. is the setup in my picture correct?
Thanks,
Gz
However, I'd like to know how to handle the specific case I'm showing on the video, when a selection group hides other primitive faces I want to add to the selection. is the setup in my picture correct?
Thanks,
Gz
Technical Discussion » The faces I want to add to a group are hidden by the existing selection
- Grendizer
- 375 posts
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Hello Jsmack, thanks for the help.
First about the camera inside, yes that's what I do but sometimes it's not possible. This shoe scene is just an example. Imagine there was a sock inside the shoe and the shoe and sock would be the same single mesh. That's what I'm confronted with these days as I'm working with imported single mesh CAD objects that have many faces sticked on top of the other. And unfortunately there is no useful primitive islands (or clusters) in the imported Alembics or STL.
You taught me something new: I didn't know you could hide a group by naming it “_3d_hidden_primitives”. Where in the doc could I read more about this? Something I noticed with this name is that it doesn't work right away. I had to press the Bypass button on the node, then uncheck it, to have the primitive faces disappear.
So following your advices, I set up a network to be able to select inward primitive faces, then delete all faces I wished. Here is a pic showing what I did. Please tell if this is what you had in mind. Thanks!!
Gz
First about the camera inside, yes that's what I do but sometimes it's not possible. This shoe scene is just an example. Imagine there was a sock inside the shoe and the shoe and sock would be the same single mesh. That's what I'm confronted with these days as I'm working with imported single mesh CAD objects that have many faces sticked on top of the other. And unfortunately there is no useful primitive islands (or clusters) in the imported Alembics or STL.
You taught me something new: I didn't know you could hide a group by naming it “_3d_hidden_primitives”. Where in the doc could I read more about this? Something I noticed with this name is that it doesn't work right away. I had to press the Bypass button on the node, then uncheck it, to have the primitive faces disappear.
So following your advices, I set up a network to be able to select inward primitive faces, then delete all faces I wished. Here is a pic showing what I did. Please tell if this is what you had in mind. Thanks!!
Gz
Technical Discussion » mantra_ipr duplicated 700 times
- Grendizer
- 375 posts
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Technical Discussion » The faces I want to add to a group are hidden by the existing selection
- Grendizer
- 375 posts
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How can I add polygon faces to a group, without displaying this group… as displaying it hides the polygon faces I want to select.. ?
I did a small video to explain the situation. Please check it.
What I tried to do: Create a second group, select the inside faces, then copy paste the selected components list from the second group to the first group , then delete the second group : it does not work.
What's the solution for this? Visibility nodes?
Thanks
Gz
I did a small video to explain the situation. Please check it.
What I tried to do: Create a second group, select the inside faces, then copy paste the selected components list from the second group to the first group , then delete the second group : it does not work.
What's the solution for this? Visibility nodes?
Thanks
Gz
Edited by Grendizer - 2018年8月31日 06:07:18
Technical Discussion » Mantra : tips to decrease render time ?
- Grendizer
- 375 posts
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Thanks guys.
Well I think I cannot reduce noise more as it would mean having a render time that's more than 30mn on this picture.
Thanks Rob for the link. Judging from this page, If I keep working with Mantra, I will have a lot of things to learn!!
“Multiprocessing” : are you speaking about this : http://www.sidefx.com/docs/houdini/ref/windows/mainprefs.html [www.sidefx.com] > compositing > cooking > threads
“Clean up your Compositions” you mean hide objects that are not in the camera's field of view?
“Trim Layers Off-Screen” : this ? http://www.sidefx.com/docs/houdini/nodes/chop/layer.html [www.sidefx.com]
Well I think I cannot reduce noise more as it would mean having a render time that's more than 30mn on this picture.
Thanks Rob for the link. Judging from this page, If I keep working with Mantra, I will have a lot of things to learn!!
“Multiprocessing” : are you speaking about this : http://www.sidefx.com/docs/houdini/ref/windows/mainprefs.html [www.sidefx.com] > compositing > cooking > threads
“Clean up your Compositions” you mean hide objects that are not in the camera's field of view?
“Trim Layers Off-Screen” : this ? http://www.sidefx.com/docs/houdini/nodes/chop/layer.html [www.sidefx.com]
Technical Discussion » Mantra : tips to decrease render time ?
- Grendizer
- 375 posts
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Yeah Daryl thanks I thought about that. But before I try other renderers I was thinking that maybe Mantra is worth giving a chance? Some people must be using it happily…
SI Users » sceneview render region, render view and actual render
- Grendizer
- 375 posts
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You may create several /out/mantra_ipr nodes and use one for the final render, another for the render view pane, etc.
Technical Discussion » Mantra : tips to decrease render time ?
- Grendizer
- 375 posts
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Wow Thanks!
Here's a new picture. The render time went from 1h34mn to 33mn!
The result looks even better than with preview. It is still a bit grainy but acceptable IMO.
Just to be sure I get the same time saving in my final render, how can I be sure mantra_IPR does not use “Preview”? I couldn't find this option in the mantra_ipr's parameters pane, and I didn't find “box filtering” neither.
33mn is much better but it is still too long for an image sequence rendering. More tips or learning material would be welcome.
Thanks
GZ
Here's a new picture. The render time went from 1h34mn to 33mn!
The result looks even better than with preview. It is still a bit grainy but acceptable IMO.
Just to be sure I get the same time saving in my final render, how can I be sure mantra_IPR does not use “Preview”? I couldn't find this option in the mantra_ipr's parameters pane, and I didn't find “box filtering” neither.
33mn is much better but it is still too long for an image sequence rendering. More tips or learning material would be welcome.
Thanks
GZ
Technical Discussion » Mantra : tips to decrease render time ?
- Grendizer
- 375 posts
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I'm using the preview tab, it used /out/mantra_ipr. I've been looking for the Preview / bucket toggle, but couldn't find it. Where is it hidden? Thanks
Technical Discussion » Mantra : tips to decrease render time ?
- Grendizer
- 375 posts
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Hello.
I'm looking for help (newbie) to decrease too long render times. Is there a documentation page about that? Or some videos?
The enclosed picture was rendered in 1 hour and 34 minutes!! Although my Mantra_Ipr settings are almost untouched.
And the result is still kind of grainy.
Image size : 1280x720
Intel Core i7-6700 2.60Ghz
Ram : 16Gb
output picture : exr
Rendering engine : Mantra, , physically based rendering
Depth of field and motion blur : off
Min max ray samples = 1 & 9
Reflect and refract limits = 3
Opacity limit = 0.995
Notes :
The render is quicker when these carafes are not visible in the camera's POV, or if the camera is farther from these objects.
So perhaps the problem is related to transparency. But even when these transparent objects are not in the camera's pov, the render is too slow.
I'm looking for help (newbie) to decrease too long render times. Is there a documentation page about that? Or some videos?
The enclosed picture was rendered in 1 hour and 34 minutes!! Although my Mantra_Ipr settings are almost untouched.
And the result is still kind of grainy.
Image size : 1280x720
Intel Core i7-6700 2.60Ghz
Ram : 16Gb
output picture : exr
Rendering engine : Mantra, , physically based rendering
Depth of field and motion blur : off
Min max ray samples = 1 & 9
Reflect and refract limits = 3
Opacity limit = 0.995
Notes :
The render is quicker when these carafes are not visible in the camera's POV, or if the camera is farther from these objects.
So perhaps the problem is related to transparency. But even when these transparent objects are not in the camera's pov, the render is too slow.
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