GPU iray rendering works in 2014, not in 2015 (3dsmax design)

[maikel_maliepaard]

Hi all,

I've got something weird on my hands.

Using 3DsMax Design 2014 with iray works perfectly it uses the GPU as well as the CPU, so no problems there. Now going with the same file to 3DsMax Design 2015 it only uses the CPU.

I already tried:

- Updating to the Nvidia driver to newest version.

- Updating to the certified 3dsmax 2015 driver.

- Rollback to current driver = 331.65

To exclude any incorrect setting in 2015 i also removed the ENU folder in AppData and restarted.

In all above situation it worked in 2014, but not in 2015.

What to try next or anyone knows the problem?

[Brock_Lafond]

Can you render a simple scene in 2015 using iRay?

Have you rebooted?

[maikel_maliepaard]

I rendered a simple scene with and without materials with the iRay engine.

No GPU is used.

See attachment for scene file.

After every update/change in driver rebooted the machine.

Thnx!

[Stefan_L]

What's stated in the Render Message Window?

After right clicking on it and enabling Information and Progress Messages here it reads:

...

RC 0.4 17 MB progr: rendering
RC 0.7 18 MB info : progressive: deactivating subsampling for iray renderer
RC 0.7 18 MB info : progressive: using iray renderer
IRAY 0.7 30 MB info : found 2 CUDA devices
IRAY 0.7 30 MB info : using CUDA device 0
IRAY 0.7 30 MB info : using CUDA device 1
IRAY 0.7 30 MB info : using CPU rendering with 8 thread(s)
IRAY 0.7 30 MB info : CUDA device 0: "GeForce GTX 580" (compute capability 2.0, 3072MB total, 1650MB available, display attached)
IRAY 0.7 30 MB info : CUDA device 1: "GeForce GTX 560 Ti" (compute capability 2.1, 2048MB total, 1912MB available)
IRAY 0.13 30 MB info : using baked environment
IRAY 0.13 30 MB progr: environment baking: started
IRAY 0.35 54 MB progr: environment baking: 13% done

...

And in the top right corner it lists 2 CUDA devices.

[maikel_maliepaard]

It states that no CUDA devices are found, altough in the render setup (at hardware resources) it can be selected.

SCEN 0.4 30 MB progr: begin scene preprocessing for frame 0
RC 0.4 30 MB progr: rendering
IRAY 0.4 109 MB warn : no CUDA capable devices found
IRAY 0.30 170 MB progr: CPU (12 threads): Processing scene...
RC 0.4 300 MB progr: progressive: finished (sub)frame 1 in 2,14036 seconds
RC 0.4 300 MB progr: progressive: finished (sub)frame 2 in 0,98166 seconds
RC 0.4 300 MB progr: progressive: finished (sub)frame 3 in 1,51966 seconds
RC 0.4 300 MB progr: progressive: finished (sub)frame 4 in 0,83715 seconds
RC 0.4 300 MB progr: progressive: finished (sub)frame 11 in 1,21467 seconds
RC 0.4 32 MB progr: rendering finished

[Stefan_L · Accepted solution]

Maybe this thread helps?

[maikel_maliepaard]

I'll take a look, thanks!

-edit-

Looked at it, Newest driver 241.21 (not the certified driver) was indeed causing the problem.

Thanks for the help!