Parsing the scene

Corona Corona for 3ds Max Issues
1

I have multiple scenes where the render hangs on Parsing the scene. I can wait forever and it wont stop parsing. I need to end 3dsmax, and open the autosave every time. This is pretty anoying. Is there anyone else having this? And is this on the top of the bug resolve list?
I am a fond user of corona but this is a big GRRRRRRRPPUMPPPFFF and ARRGGGHHHGGHGHH for me…

btw, its totally random

2

Could be a RAM issue.

3

Which version of Corona? Can you report it over helpdesk? https://coronarenderer.freshdesk.com/support/tickets/new

4

@maru: done / corona 1.3 in 3dsmax 2015

Ram is 32Gb, and only uses (when it does render) around 5Gb

5

do you have motionblur turned on and object that has motionblur is selected when put to rendering?

I have this happen with “XMesh” object selected and if motionblur is turned on in render setup dialogue. It hangs on parsing scene.

6

Do you use Corona bitmaps?

7

Hi,
any progress? Does it happen in latest RC? can you share a scene where it happens (Chaos)? How much random it is?

8

i have the same issue - its totally random - it does not take forever but it can take a good minute for what would usually take 3 seconds.

9

Which version of Corona?

10

I might have idea about it since i am active Thinking particle user.

There is a pausability that corona hangs if there is no prerecorded particle cache. Or if simulations of any kind are going on while the rendering proces is beeing started (for example it needs to be something recalculated, for example aditional teselation, before render of new frame).

This is very anoying limitation but still this is LIMITATION related to any particle cache not only TP.

To avoid this:

1 - always prerecord cache before starting render.
2 - chek and double chek for maching of vieport and render sttings.

PS - i could have reacted earlier on this thread, it is because i read only part of the topic.

PSS - also insane amount of motion blurred geometry might cause insane acc structure building times (for example scattered trees with wind, or alot of particles shitload millions for them) then you should use 1 velocity chanel 2 pixel motion blur in addobe after effects.

11

I’ve had this a lot recently using very heavy forest pack carpets.

It would be great to be able to escape out of parsing and/or see parsing progress.

Cheers

Jan

12

CAn you (anyone with this problem) capture a minidump when it happens? How is the CPU and RAM usage when it happens?

13

Hi Ondra

The scene doesn’t crash it will just freeze up and continue parsing for 2-3 hours. It renders fine after but this quite a leap of faith for a render.

Ram at about 60%
CPU at 25%

Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz (×2) 64 GB RAM

The dump file is 5 GB compressed. We can drop box it to you perhaps?

Cheers

Jan

14

Zipping the file should help tremendously. But our dropbox uploader can handle up to 10GB files: Dropbox

15

We just shared it with you via dropbox. Hopefully you got an email with a link. 5GB.

Cheers,

16

got it, thanks. Note to self: _forum 11326

17

Hi,
I analyzed the memory dump and it is stuck inside forest pack plugin, in its IForestRenderBegin method. We cannot speed that up or cancel it from Corona. I can forward the memory dump to guys at Itoo if you allow me, perhaps they will look at it and try to optimize it. I am moving this to resolved in the meantime

18

Hi Ondra,

Please do.

Many thanks

Jan

19

great, would you also share the problematic scene with Itoo?

20

Forwarded the report to Itoo