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Technical Discussion » Flickering on animation
- Island
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I was partially able to solve this, but I don't know why this is so much more complicated than Cinema 4D's sweep nurb. In C4D, a sweep allows spine control (for varying thickness) easily, creates UV's automatically, and doesn't have to do strange things like start with an open circle of 359 degrees and exchanging U and V coordinates to avoid ugly seams. If one adds a polycap, it creates ugly renders like above. I have to select the end loop and create groups to have it behave properly. Here is a fix with notes to show the issues and an updated file. Please, SideFx, make this easier - if you want to market Houdini to modelers.
Edited by Island - April 20, 2018 21:47:07
Technical Discussion » Flickering on animation
- Island
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I've been trying to UV map a sweep model of a square knot, and I added a rotation over time to the cross section (circle). Most of the time it animates ok, but for certain frames, I get an ugly artifact (see attachment). I'm not sure what I am doing wrong.
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Technical Discussion » Simple parenting problem.
- Island
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Thank you so much! That was the issue. I wonder why the preference got set to “never” or even why that might be a preference, but no matter.
Technical Discussion » Simple parenting problem.
- Island
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With Version 16.5.439 of Houdini Indie, it doesn't seem to matter whether “Keep position when parenting” is checked or unchecked. In either case, the child object moves to the position of the parent. I know this is a beginner issue, but it does not do what it does in several tutorials. (OSX) If you open the attached file and drag wires between the null and either the box (where Keep position when parenting is selected)or tube (where Keep position when parenting is deselected) the objects move to the nulls position.
Technical Discussion » Strange render issue
- Island
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The errors persisted after latest daily build as well as after deleting houdini_temp from /tmp and deleting the deleting my $HOME/houdini16.5 directory. It goes away with scaling the objects and also is not present if I change the area light's shadow to raytraced. I've created a simpler scene that was not scaled and it did not have this problem, so it must be a combination of number of objects, size of objects, and depth map shadows.
Technical Discussion » Strange render issue
- Island
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Apparently the issue is that render view uses ray traced shadows and mplay or render to disk uses the setting in the file of depth map shadows. If the objects are too small, depth map shadows don’t work correctly. Scaling the objects in the scene fixes this.
Technical Discussion » Strange render issue
- Island
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I was trying to simulate GI in a very simple scene and the render view looks ok but the render is messed up with shadows (see attachments). Initially it output correctly. I now see an error message in the Mantra node that says
Command Exit Code: 139
Error: Couldn't remove old operator type definition sesi_temporary::Object/subnet
89268: Fatal error: Segmentation fault (sent by pid 0)
– TRACEBACK BEGIN –
2 libHoudiniUT.dylib 0x000000010729e964 stackTrace() + 244
3 libHoudiniUT.dylib 0x000000010729e5fc signalCallback(UTsignalHandlerArg) + 492
4 libHoudiniUT.dylib 0x0000000107594a30 UT_Signal::processSignal(int, __siginfo*, void*) + 176
5 libsystem_platform.dylib 0x00007fff593c4f5a _sigtramp + 26
6 ??? 0x0000000000000000 0x0 + 0
7 IMG_OpenEXR.dylib 0x00000001235bf1c5 IMG_OpenEXR::readScanline(int, void*) + 565
8 libHoudiniUT.dylib 0x00000001079a3ca5 IMG_File::read(int, IMG_Plane const*) + 661
9 libHoudiniUT.dylib 0x00000001079d6205 IMG_FileFilterConvert::readPlaneScanline(int, IMG_Plane const&) + 117
10 libHoudiniUT.dylib 0x00000001079a3cc6 IMG_File::read(int, IMG_Plane const*) + 694
11 libHoudiniUT.dylib 0x00000001079d7c78 IMG_FileFilterFlip::readPlaneScanline(int, IMG_Plane const&) + 168
12 libHoudiniUT.dylib 0x00000001079a3cc6 IMG_File::read(int, IMG_Plane const*) + 694
13 libHoudiniUT.dylib 0x000000010799cdb9 IMGfindDataWindow(IMG_File*, UT_Rect&, double, std::__1::basic_ostream >*) + 1577
14 libHoudiniUT.dylib 0x000000010799d19f IMGfindAndSetDataWindow(char const*, char const*, double, long long, bool, int, bool, bool, char const*, double, bool, std::__1::basic_ostream >*, std::__1::basic_ostream >*, bool, UT_Options*) + 479
15 IMG_OpenEXR.dylib 0x00000001235c6aa7 IMG_OpenEXR::postCloseAction() + 391
16 libHoudiniUT.dylib 0x00000001079a5cde IMG_File::close() + 222
17 libHoudiniUT.dylib 0x00000001079d31f2 IMG_FileFilter::closeFile() + 34
18 libHoudiniUT.dylib 0x00000001079a5c32 IMG_File::close() + 50
19 libHoudiniUT.dylib 0x00000001079d31f2 IMG_FileFilter::closeFile() + 34
20 libHoudiniUT.dylib 0x00000001079a5c32 IMG_File::close() + 50
21 libHoudiniUT.dylib 0x00000001079d31f2 IMG_FileFilter::closeFile() + 34
22 libHoudiniUT.dylib 0x00000001079a5c32 IMG_File::close() + 50
23 libHoudiniUT.dylib 0x00000001079ce995 IMG_TileFile::close(bool) + 69
24 libHoudiniRAY.dylib 0x000000011e2b793b RAY_TileDevice::close() + 139
25 libHoudiniRAY.dylib 0x000000011e17bca4 RAY_ImagerFile::closeDevice() + 468
26 libHoudiniRAY.dylib 0x000000011e1755f0 RAY_Imager::close() + 16
27 libHoudiniRAY.dylib 0x000000011e2265db RAY_Scene::finishRender() + 59
28 libHoudiniRAY.dylib 0x000000011e22978b RAY_Scene::render() + 2027
29 libHoudiniRAY.dylib 0x000000011e26a44d RAY_SceneIO::doRender(CMD_Args&) + 1661
30 libHoudiniPRM.dylib 0x0000000109b377c2 CMD_Manager::runCommand(char*) + 4146
31 libHoudiniPRM.dylib 0x0000000109b2373e CMD_Manager::internalExecute(char const*) + 3534
32 libHoudiniPRM.dylib 0x0000000109b34c3c CMD_Manager::processInput(CMD_Source*, char const*) + 140
33 libHoudiniPRM.dylib 0x0000000109b355bf CMD_Manager::internalSendInput(char const*, bool) + 1535
34 libHoudiniPRM.dylib 0x0000000109b35cb4 CMD_Manager::sendInputNoLock(char const*, bool) + 68
35 libHoudiniRAY.dylib 0x000000011e263118 RAY_Scene::load(UT_IStream&) + 472
36 mantra 0x0000000105039e56 main + 2694
37 libdyld.dylib 0x00007fff590b6015 start + 1
– TRACEBACK END –
Error: Couldn't remove old operator type definition sesi_temporary::Object/subnet
I tried to delete and recreate the Mantra node and I still get the errors on render that are not on renderview. I am stumped.
Command Exit Code: 139
Error: Couldn't remove old operator type definition sesi_temporary::Object/subnet
89268: Fatal error: Segmentation fault (sent by pid 0)
– TRACEBACK BEGIN –
2 libHoudiniUT.dylib 0x000000010729e964 stackTrace() + 244
3 libHoudiniUT.dylib 0x000000010729e5fc signalCallback(UTsignalHandlerArg) + 492
4 libHoudiniUT.dylib 0x0000000107594a30 UT_Signal::processSignal(int, __siginfo*, void*) + 176
5 libsystem_platform.dylib 0x00007fff593c4f5a _sigtramp + 26
6 ??? 0x0000000000000000 0x0 + 0
7 IMG_OpenEXR.dylib 0x00000001235bf1c5 IMG_OpenEXR::readScanline(int, void*) + 565
8 libHoudiniUT.dylib 0x00000001079a3ca5 IMG_File::read(int, IMG_Plane const*) + 661
9 libHoudiniUT.dylib 0x00000001079d6205 IMG_FileFilterConvert::readPlaneScanline(int, IMG_Plane const&) + 117
10 libHoudiniUT.dylib 0x00000001079a3cc6 IMG_File::read(int, IMG_Plane const*) + 694
11 libHoudiniUT.dylib 0x00000001079d7c78 IMG_FileFilterFlip::readPlaneScanline(int, IMG_Plane const&) + 168
12 libHoudiniUT.dylib 0x00000001079a3cc6 IMG_File::read(int, IMG_Plane const*) + 694
13 libHoudiniUT.dylib 0x000000010799cdb9 IMGfindDataWindow(IMG_File*, UT_Rect&, double, std::__1::basic_ostream >*) + 1577
14 libHoudiniUT.dylib 0x000000010799d19f IMGfindAndSetDataWindow(char const*, char const*, double, long long, bool, int, bool, bool, char const*, double, bool, std::__1::basic_ostream >*, std::__1::basic_ostream >*, bool, UT_Options*) + 479
15 IMG_OpenEXR.dylib 0x00000001235c6aa7 IMG_OpenEXR::postCloseAction() + 391
16 libHoudiniUT.dylib 0x00000001079a5cde IMG_File::close() + 222
17 libHoudiniUT.dylib 0x00000001079d31f2 IMG_FileFilter::closeFile() + 34
18 libHoudiniUT.dylib 0x00000001079a5c32 IMG_File::close() + 50
19 libHoudiniUT.dylib 0x00000001079d31f2 IMG_FileFilter::closeFile() + 34
20 libHoudiniUT.dylib 0x00000001079a5c32 IMG_File::close() + 50
21 libHoudiniUT.dylib 0x00000001079d31f2 IMG_FileFilter::closeFile() + 34
22 libHoudiniUT.dylib 0x00000001079a5c32 IMG_File::close() + 50
23 libHoudiniUT.dylib 0x00000001079ce995 IMG_TileFile::close(bool) + 69
24 libHoudiniRAY.dylib 0x000000011e2b793b RAY_TileDevice::close() + 139
25 libHoudiniRAY.dylib 0x000000011e17bca4 RAY_ImagerFile::closeDevice() + 468
26 libHoudiniRAY.dylib 0x000000011e1755f0 RAY_Imager::close() + 16
27 libHoudiniRAY.dylib 0x000000011e2265db RAY_Scene::finishRender() + 59
28 libHoudiniRAY.dylib 0x000000011e22978b RAY_Scene::render() + 2027
29 libHoudiniRAY.dylib 0x000000011e26a44d RAY_SceneIO::doRender(CMD_Args&) + 1661
30 libHoudiniPRM.dylib 0x0000000109b377c2 CMD_Manager::runCommand(char*) + 4146
31 libHoudiniPRM.dylib 0x0000000109b2373e CMD_Manager::internalExecute(char const*) + 3534
32 libHoudiniPRM.dylib 0x0000000109b34c3c CMD_Manager::processInput(CMD_Source*, char const*) + 140
33 libHoudiniPRM.dylib 0x0000000109b355bf CMD_Manager::internalSendInput(char const*, bool) + 1535
34 libHoudiniPRM.dylib 0x0000000109b35cb4 CMD_Manager::sendInputNoLock(char const*, bool) + 68
35 libHoudiniRAY.dylib 0x000000011e263118 RAY_Scene::load(UT_IStream&) + 472
36 mantra 0x0000000105039e56 main + 2694
37 libdyld.dylib 0x00007fff590b6015 start + 1
– TRACEBACK END –
Error: Couldn't remove old operator type definition sesi_temporary::Object/subnet
I tried to delete and recreate the Mantra node and I still get the errors on render that are not on renderview. I am stumped.
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The Orbolt Smart 3D Asset Store » PBR shader
- Island
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Thank you. That is helpful. I am trying to get away from fake looking speculars.
Edited by Island - Jan. 23, 2018 15:04:25
The Orbolt Smart 3D Asset Store » PBR shader
- Island
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Most 3D programs have a way of importing older models (to prevent obsolescence). Is that not the case with Houdini? Was the mantra shader system changed substantially between version 15 and 16.5?
The Orbolt Smart 3D Asset Store » PBR shader
- Island
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The Orbolt Smart 3D Asset Store » PBR shader
- Island
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I downloaded the PBR shader demo version to try it out (with plans for purchase). I get error messages when I try to load this asset. Is it not compatible with Houdini 16.5?
Houdini Indie and Apprentice » Can`t type in numbers anymore
- Island
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Houdini Indie and Apprentice » Can`t type in numbers anymore
- Island
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You have probably tried this already, but did you delete channel before trying to enter a number? If the number is being driven by an expression, that will clear it.
Houdini Indie and Apprentice » possible parenting bug
- Island
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With OSX and Houdini Indie 16.5.318, parenting doesn't appear to work correctly. In the scene view, if I add two primitives (like a cube and sphere) and move one to the side and one slightly upward, at least one of the objects will move if I parent one to the other regardless of whether “Keep position when parenting” is selected or deselected in either or both nodes. Is this a bug? (child compensation also doesn't seem to alter this behavior). I've also tried all options in the “Modify pre transform” dropdown boxes and cannot get a way to parent without changing position.
Edited by Island - Jan. 1, 2018 18:34:21
Houdini Indie and Apprentice » Houdini directory issues
- Island
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Discussing this with tech support, I think the issue does related to OSX opening Houdini from the dock or “applications”. As mentioned in the SideFx support documents, environmental variables may not be loaded when Houdini is launched from applications or the doc. I think it works differently in Windows.
I fixed some corrupted pref files, so it is possible that this was a factor as well. But more importantly, in Houdini 14 (but not apparently in 14.5) setting the preferences for “file chooser” to anything other than “Houdini chooser only” can crash mplay and image viewer. So when one comes to saving a file, Houdini defaults to its “Houdini chooser”.
Here is how things go wrong. If one has a directory “../users/username/documents/houdini/geo” and creates a new houdini document, it is easy to specify the file write directory to “$HIP/documents/houdini/geo”. $HIP will be ..users/username by default, and the file can be written. However, if one saves the houdini file to ../users/username/documents/houdini, $HIP will instantly be changed to ../users/username/documents/houdini and the file write node will then point to a non existant directory: ../users/username/documents/houdini/documents/houdini/geo.
I fixed some corrupted pref files, so it is possible that this was a factor as well. But more importantly, in Houdini 14 (but not apparently in 14.5) setting the preferences for “file chooser” to anything other than “Houdini chooser only” can crash mplay and image viewer. So when one comes to saving a file, Houdini defaults to its “Houdini chooser”.
Here is how things go wrong. If one has a directory “../users/username/documents/houdini/geo” and creates a new houdini document, it is easy to specify the file write directory to “$HIP/documents/houdini/geo”. $HIP will be ..users/username by default, and the file can be written. However, if one saves the houdini file to ../users/username/documents/houdini, $HIP will instantly be changed to ../users/username/documents/houdini and the file write node will then point to a non existant directory: ../users/username/documents/houdini/documents/houdini/geo.
Houdini Indie and Apprentice » Recommended best practice for lathe
- Island
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Houdini Indie and Apprentice » Recommended best practice for lathe
- Island
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Since I am learning Houdini, I was trying to create a lathe surface. It appears there are more ways than in other 3D programs to create this. Is there a best practice for procedural modeling to create models that will not come back to bite you when you are doing something more complex? I see there are five ways at least to create a lathe in Houdini (see attachment). So my question is, when one is starting a procedural model, how does one go about thinking of the best method? With destructive modeling, it would not really matter.
Edited by Island - Dec. 9, 2017 11:57:48
Houdini Indie and Apprentice » Houdini directory issues
- Island
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Thank you for the link. I had read this, but $HIP defaults to users\username if I don't start by opening a preexisting file. If I open I file from another location, as mentioned at the beginning of this post, Houdini is able to open the file but unable to find the actual directories that are easily opened in OSX finder (see first screen shot at the beginning of this thread) when it comes to writing a file. My previous discussions with tech support suggested that there is a bug in Houdini and I MUST use preferences>general user interface>file choosers that I set it to “houdini Chooser Only” to avoid crashes. When this is enabled, I get the error messages as above. It looks like I need to submit this as a bug report to SideFx.
The reason I wonder if it is an OSX issue (apart from my discussions with SideFx tech support about the preferences) is that the SideFx documents say that starting Houdini from the dock or Application menu in OSX may not load up all Houdini environment variables, unlike starting it in Windows. The document suggests starting Houdini via typing in the command line in OSX if loading the preferences is important.
The reason I wonder if it is an OSX issue (apart from my discussions with SideFx tech support about the preferences) is that the SideFx documents say that starting Houdini from the dock or Application menu in OSX may not load up all Houdini environment variables, unlike starting it in Windows. The document suggests starting Houdini via typing in the command line in OSX if loading the preferences is important.
Edited by Island - Dec. 7, 2017 10:36:45
Houdini Indie and Apprentice » Houdini directory issues
- Island
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Maybe this is an OSX issue, since $HIP/Houdini/HoudiniProjects expands to users/username/Houdini/HoudiniProjects, not users/username/Documents/Houdini/HoudiniProjects. (two month old iMac 2017 with most recent OS). It would be nice to relocate $HIP to point to users/Username/Documents/Houdini. When I echo $HIP, I get users/username
Edited by Island - Dec. 6, 2017 13:25:48
Houdini Indie and Apprentice » Houdini directory issues
- Island
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Can someone please point me to how to edit some config file so that Houdini correctly recognizes OSX directory structures? It does behave better if I change the project directory to username/HoudiniProjects.
Edited by Island - Dec. 6, 2017 12:46:33
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