Forest Pack with VRay IPR rendering

[MH4288]

Hi,

there is a huge problem with Forest pack. When you try to render with Vray IPR, everything seems ok, I can change camera angle, FP distribution and so on. BUT when I try to change something in material which affect FP, whole max will crash. It is really terrible. Sometime one or two changes are ok, but next material change will crash max for sure. Please fix it, it is really hard to work that way. With Vray 4 and some older FP it was without any problem.

[Michal Karmazín]

Hi,

I'm sorry to hear, you're facing these troubles. I've done some tests using the 3ds max 2024.2 Update, V-Ray 6 Update 2 & FP 8.2.5, but I can't reproduce these troubles here. If that leads to a "3ds max crash" on your configuration, can you please send us the minidump file of the crash? Hopefully, it'll point to the problem source. Thanks in advance.

Best regards,

[MH4288]

Probably it is happen more with somehow complex scene. When you try this with boxes and spheres it is probably ok :-) When I got time, I start that scene and try it again. Hope it will write minidump.

[CharlyRT]

Hi there, im also having trouble using Vray in IPR while editing a Forestpack object, first I thought it was some xref object with a corrupted object, but i can reproduce it in a simple scene with a plane and a Layered Lawn Preset, it crash after doing some changes in the material, strange thing its that it didnt happend in another scene, what im trying to do is change color with "get color from map" after some changes it crash, also its impossible to select Forest and RailClone objects during IPR, if selected with lister it takes too long to load it. I cannot attach the file but hopely you can reproduce it

Im using
3ds Max 2024.2
Vray 6.20.03 (latest nightly build 32443)
ForestPack 8.2.5

[Michal Karmazín]

Could you please send us the minidump file of the crash? Thanks in advance.

Best regards,

[CharlyRT]

Ouch, sorry, I thought that the Dump files were attached:

1 is from the Test Scene I record (Vray IPR Crash)
2 is from the Scene that Im working on (Brick House)

Hope this help

[iToo]

According the minidumps, you're using one of the V-Ray nightly builds (6.20.3.0).
And both crashes seem to happen at VRender2024.dll, which is one of the V-Ray files.

Unfortunately, these files changes daily and i don't know what exact build do you use.
We need to install the same version, to analyze the minidump correctly.

Please, do this:

a) If you need to use the nightly build:

- Download the latest build.
- Take note of the build date, which is displayed in the chaos site.
- Try to reproduce the problem again, and send us an updated minidump.

b) If you prefer to go back to a stable release.

- Download the latest stable version.
- Check if the problem continues. If so, send us a new minidump.

If problems happens in the V-Ray side, we must send the minidumps to them, with this information.

Thanks,

[CharlyRT]

Sorry I only put the Vray nightly build but not the date, well it doesnt matter, I tried again with the latest stable version of 6.2 and also update ForestPack to 8.2.6 and 3ds Max to 24.2.1 and the error still occurs, here is the minidump, hope this helps.

[iToo]

Thanks. We just sent the minidump to ChaosGroup, because latest crash point is on the V-Ray side.
I will post here as soon as we have more information.

[iToo]

Chaos team almost identified where is the problem, but they need to reproduce the crash locally.
They tried with a simple scene as you shown in the video, and following exactly your steps, but problem was not reproducible. I must add, i cannot reproduce it here either.

Please, would you send us your scene ? May be there is something different which we are missing.

Thanks.

[CharlyRT]

I cannot provide the scene because its heavier than 5 mb  , im using one of the Forestpack grass presets, could it work to get you a link from Drive?
if that doesnt work, as I recall I could reproduce it with single boxes, let me try to do that and send it here, however I have already get it contact with chaos and provide the scene there but, havent received any news from them.

https://drive.google.com/drive/folders/1kBPyNmO0XIlxgzQUEjvhGnBPweAwfnqL?usp=sharing

[iToo]

I just received a message from our contact in Chaos, they finally could reproduce the problem (it's a random issue).
They logged the defect and will work on that. Hopefully it would be fixed on next V-Ray updates.

[CharlyRT]

They have answer me too, thanks for the update  .