V-Ray for Houdini package stops Karma LOP working.

V-Ray V-Ray for Houdini Issues
1

Is anyone else getting this issue. If I have the V-Ray for Houdini package active, the Karma LOP will not render. It seems to just fail silently on each frame. If I deactivate the V-Ray for Houdini package, the Karma Lop works fine again.

This is my vray.json package file:


{
"enable": "houdini_version == '18.5.499'",
"env": [ [INDENT]{ "INSTALL_ROOT" : "${ENV_ROOT}/vray_adv_51020_houdini18.5.499" },

{ "VRAY_APPSDK" : "${INSTALL_ROOT}/appsdk" },
{ "VRAY_OSL_PATH" : "${INSTALL_ROOT}/appsdk/bin" },
{ "VRAY_UI_DS_PATH" : "${INSTALL_ROOT}/ui" },
{ "VFH_HOME" : "${INSTALL_ROOT}/vfh_home" },

{[/INDENT]
  [INDENT=2]"PYTHONPATH": {[/INDENT]
  [INDENT=3]"method": "append",
"value": [[/INDENT]
  [INDENT=4]"${INSTALL_ROOT}/appsdk/python37"[/INDENT]
  [INDENT=4]][/INDENT]
  [INDENT=2]}[/INDENT]
  [INDENT]},

{[/INDENT]
  [INDENT=2]"PATH": {[/INDENT]
  [INDENT=3]"method": "append",
"value": [[/INDENT]
  [INDENT=4]"${HFS}/bin",
"${VRAY_APPSDK}/bin",
"${VFH_HOME}/bin"[/INDENT]
  [INDENT=4]][/INDENT]
  [INDENT=2]}[/INDENT]
  [INDENT]},

{ "HOUDINI_GALLERY_PATH": ["${HOUDINI_GALLERY_PATH}", "${VFH_HOME}/gallery"] }[/INDENT]
 ],
"path" : "${VFH_HOME}"
}
2

Does this happen for any scene? I’ve just tried Karma, works fine for me…

Not sure you need to add “${HFS}/bin” to PATH though…

3

Hey. Yep, it does appear to happen on all scenes. I set up a new one to be sure and got the same behaviour. It’s a bit odd. I assume it’s a bad path somewhere. Annoyingly Karma gives me no output so it makes pinning it down a bit tricky!

4

Just adding that we got Karma, VRay and a bunch of delegates working at the same time in LOPs so must be a bad environment setup somewhere.

-- Erik

5

Yep. I haven’t had the chance to debug it properly yet but it’s good to know it can work! Out of interest are you running V-Ray on a central install and what versions of Houdini/V-Ray are you using?

6

Central install on the nfs share from zip package. Version on the project I tested on is 5.10.20 build 79890e2 together with Houdini 18.5.499 on CentOs 7.9

-- Erik