IRay not using GPU anymore. Have enough VRAM.

Paradigm

I'm on the most recent release of DS and I'm using a GTX 970. I have a scene with two clothed figures inside a diningroom with a table and chairs. That's it. I have MSI afterburner open as always and did a test render earlier today and the scene kicked my card into overdrive like it usually does. Rendered iterations very quickly. 

I tweaked some poses and re-rendered and.... Nothing. It went from rendering 140 iterations in 5 minutes to doing 20 in the same time period.  My overclock is doing nothing, my power is sitting at 15% instead of it's usual 80% + when rendering.

 

 

I checked the log and there are no errors about the scene not fitting. I checked using the Iray Memory Assistant and it thinks I have PLENTY of vram available. Closing and opening the scene does not help. Any thoughts? 

 

Below is an excerpt from the render log:

 

1.051 Rendering image
2016-56-23 14:56:13.950 Iray INFO - module:category(IMAGE:IO):   1.0   IMAGE  io   info : Loading image "D:/DAZ Content/Runtime/Textures/DimensionTheory/iRadiance/RealWorldHDR/DTHDR-NightTimeC.hdr", pixel type "Rgb_fp", 8192x4096x1 pixels, 1 miplevel.
2016-56-23 14:56:15.305 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : Creating irt render context (cache id: 0x0000000100000001).
2016-56-23 14:56:15.486 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_844_2743: displacement shader returned values up to 0.0133435, clipped to max displace 0.0132952
2016-56-23 14:56:15.487 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_849_2760: displacement shader returned values up to 0.0139916, clipped to max displace 0.0132952
2016-56-23 14:56:15.487 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_84f_2777: displacement shader returned values up to 0.0143747, clipped to max displace 0.0132952
2016-56-23 14:56:15.488 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_855_2794: displacement shader returned values up to 0.0143747, clipped to max displace 0.0132952
2016-56-23 14:56:15.488 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_85b_2811: displacement shader returned values up to 0.0144028, clipped to max displace 0.0132952
2016-56-23 14:56:15.492 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_861_2828: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:15.494 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_869_2859: displacement shader returned values up to 0.0144118, clipped to max displace 0.0132952
2016-56-23 14:56:15.495 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_873_2893: displacement shader returned values up to 0.0144086, clipped to max displace 0.0132952
2016-56-23 14:56:16.175 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_89a_3011: displacement shader returned values up to 0.0143638, clipped to max displace 0.0132952
2016-56-23 14:56:16.177 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_8a1_3040: displacement shader returned values up to 0.0142651, clipped to max displace 0.0132952
2016-56-23 14:56:16.186 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_8a8_3066: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:16.190 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_8b8_3126: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:16.192 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_8c1_3160: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:16.203 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_8c9_3185: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:16.207 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_8db_3252: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:16.212 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_8e3_3286: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:16.219 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_8ee_3336: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:16.496 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_908_3446: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:16.505 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_913_3495: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:16.652 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_93a_3620: displacement shader returned values up to 0.014277, clipped to max displace 0.0132952
2016-56-23 14:56:16.654 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_944_3656: displacement shader returned values up to 0.0144118, clipped to max displace 0.0132952
2016-56-23 14:56:16.656 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_94b_3683: displacement shader returned values up to 0.0144118, clipped to max displace 0.0132952
2016-56-23 14:56:16.658 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_952_3710: displacement shader returned values up to 0.0142749, clipped to max displace 0.0132952
2016-56-23 14:56:16.659 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_95c_3746: displacement shader returned values up to 0.0144118, clipped to max displace 0.0132952
2016-56-23 14:56:16.661 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_963_3773: displacement shader returned values up to 0.0144118, clipped to max displace 0.0132952
2016-56-23 14:56:18.702 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_97f_3871: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:18.704 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_987_3898: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:18.709 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_98f_3925: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:18.710 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_997_3950: displacement shader returned values up to 0.0142017, clipped to max displace 0.0132952
2016-56-23 14:56:18.716 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_99e_3976: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:18.719 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_9ac_4038: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:18.723 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_9b6_4080: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:18.724 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_9c3_4137: displacement shader returned values up to 0.0142017, clipped to max displace 0.0132952
2016-56-23 14:56:18.728 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_9c9_4161: displacement shader returned values up to 0.0144164, clipped to max displace 0.0132952
2016-56-23 14:56:18.732 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_9e8_4255: displacement shader returned values up to 0.0144118, clipped to max displace 0.0132952
2016-56-23 14:56:18.734 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_9ef_4282: displacement shader returned values up to 0.0144118, clipped to max displace 0.0132952
2016-56-23 14:56:18.735 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_9f6_4309: displacement shader returned values up to 0.0144118, clipped to max displace 0.0132952
2016-56-23 14:56:18.737 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_9fd_4336: displacement shader returned values up to 0.0144118, clipped to max displace 0.0132952
2016-56-23 14:56:18.739 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_a04_4363: displacement shader returned values up to 0.0144118, clipped to max displace 0.0132952
2016-56-23 14:56:18.742 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_a14_4414: displacement shader returned values up to 0.0141805, clipped to max displace 0.0132952
2016-56-23 14:56:18.743 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_a24_4466: displacement shader returned values up to 0.0143492, clipped to max displace 0.0132952
2016-56-23 14:56:18.744 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_a37_4528: displacement shader returned values up to 0.0139372, clipped to max displace 0.0132952
2016-56-23 14:56:18.744 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_a41_4565: displacement shader returned values up to 0.0142037, clipped to max displace 0.0132952
2016-56-23 14:56:18.746 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_a49_4594: displacement shader returned values up to 0.0143212, clipped to max displace 0.0132952
2016-56-23 14:56:18.749 WARNING: dzneuraymgr.cpp(261): Iray WARNING - module:category(DISPLA:GEOMETRY):   1.0   DISPLA geo  warn : Object DS_shape_a5d_4665: displacement shader returned values up to 0.0144227, clipped to max displace 0.0132952
2016-56-23 14:56:19.208 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : Disabling instancing.
2016-56-23 14:56:19.208 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : Rebuild all clusters.
2016-57-23 14:57:19.091 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : Scene update took 63.741642 seconds.
2016-57-23 14:57:26.594 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : 94.8% of radiant power of environment in 0.2% of the solid angle.
2016-57-23 14:57:27.433 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : Creating multiscale environment representation of resolution 8192x4096 took 8.322665s
2016-57-23 14:57:27.437 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : Progressive buffer resolution 1920x1080 (size: 1080, offset: 0, stride: 2, block_size 2)
2016-57-23 14:57:38.573 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0001 in 83.252512s, 0.0fps (internal: 11.101506s, 0.1fps, overhead 86.7%)
2016-57-23 14:57:49.092 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0002 in 10.493538s, 0.1fps (internal: 10.464262s, 0.1fps, overhead 0.3%)
2016-57-23 14:57:59.908 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0003 in 10.791201s, 0.1fps (internal: 10.762094s, 0.1fps, overhead 0.3%)
2016-58-23 14:58:10.439 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0004 in 10.509184s, 0.1fps (internal: 10.479044s, 0.1fps, overhead 0.3%)
2016-58-23 14:58:21.021 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0005 in 10.559268s, 0.1fps (internal: 10.529661s, 0.1fps, overhead 0.3%)
2016-58-23 14:58:31.814 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0006 in 10.768843s, 0.1fps (internal: 10.739638s, 0.1fps, overhead 0.3%)
2016-58-23 14:58:42.506 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0007 in 10.670600s, 0.1fps (internal: 10.641131s, 0.1fps, overhead 0.3%)
2016-58-23 14:58:53.306 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0008 in 10.776962s, 0.1fps (internal: 10.747105s, 0.1fps, overhead 0.3%)
2016-59-23 14:59:04.147 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0009 in 10.819265s, 0.1fps (internal: 10.790195s, 0.1fps, overhead 0.3%)
2016-59-23 14:59:14.706 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0010 in 10.535745s, 0.1fps (internal: 10.506723s, 0.1fps, overhead 0.3%)
2016-59-23 14:59:25.343 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0011 in 10.613648s, 0.1fps (internal: 10.584283s, 0.1fps, overhead 0.3%)
2016-59-23 14:59:36.540 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0012 in 11.169873s, 0.1fps (internal: 11.140822s, 0.1fps, overhead 0.3%)
2016-59-23 14:59:47.230 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0013 in 10.665537s, 0.1fps (internal: 10.635557s, 0.1fps, overhead 0.3%)
2016-59-23 14:59:57.778 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0014 in 10.525052s, 0.1fps (internal: 10.495479s, 0.1fps, overhead 0.3%)
2016-00-23 15:00:08.815 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0015 in 11.014055s, 0.1fps (internal: 10.984134s, 0.1fps, overhead 0.3%)
2016-00-23 15:00:19.787 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0016 in 10.949172s, 0.1fps (internal: 10.917770s, 0.1fps, overhead 0.3%)
2016-00-23 15:00:30.537 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0017 in 10.726854s, 0.1fps (internal: 10.690641s, 0.1fps, overhead 0.3%)
2016-00-23 15:00:41.394 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0018 in 10.832321s, 0.1fps (internal: 10.797491s, 0.1fps, overhead 0.3%)
2016-00-23 15:00:52.153 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0019 in 10.735848s, 0.1fps (internal: 10.693861s, 0.1fps, overhead 0.4%)
2016-01-23 15:01:02.940 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0020 in 10.764148s, 0.1fps (internal: 10.722292s, 0.1fps, overhead 0.4%)
2016-01-23 15:01:13.412 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0021 in 10.447936s, 0.1fps (internal: 10.413455s, 0.1fps, overhead 0.3%)
2016-01-23 15:01:24.389 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0022 in 10.953776s, 0.1fps (internal: 10.921811s, 0.1fps, overhead 0.3%)
2016-01-23 15:01:35.091 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0023 in 10.678752s, 0.1fps (internal: 10.649020s, 0.1fps, overhead 0.3%)
2016-01-23 15:01:45.787 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0024 in 10.673641s, 0.1fps (internal: 10.644250s, 0.1fps, overhead 0.3%)
2016-01-23 15:01:56.318 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0025 in 10.508708s, 0.1fps (internal: 10.479273s, 0.1fps, overhead 0.3%)
2016-02-23 15:02:06.920 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0026 in 10.579182s, 0.1fps (internal: 10.548414s, 0.1fps, overhead 0.3%)
2016-02-23 15:02:17.761 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0027 in 10.819011s, 0.1fps (internal: 10.789999s, 0.1fps, overhead 0.3%)
2016-02-23 15:02:28.870 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0028 in 11.086183s, 0.1fps (internal: 11.056091s, 0.1fps, overhead 0.3%)
2016-02-23 15:02:40.000 Iray INFO - module:category(IRT:RENDER):   1.0   IRT    rend info : rendered frame 0029 in 11.106423s, 0.1fps (internal: 11.075961s, 0.1fps, overhead 0.3%)
2016-02-23 15:02:41.186 Saved image: C:\Users\Admin\AppData\Roaming\DAZ 3D\Studio4\temp\render\r.png
2016-02-23 15:02:41.516 Finished Rendering
2016-02-23 15:02:41.538 Total Rendering Time: 6 minutes 30.53 seconds

Tobor

There's something in the scene that Iray isn't liking. If you get a ton of warnings like this it's a good idea to try to find what's causing and fix it.

Try restarting D|S and even your whole computer and try a new render. If it's initially successful, then fails, then something in your scene is clobbering the output. I've had this happen to me from time to time, especially when using older content.

If the problem doesn't reoccur after restarting, then it was just one of those things.