How do I properly pause and resume my render?

Jasp3r · Post by **Jasp3r** » Fri Apr 01, 2011 7:16 pm

Last night I went to bed so I had to turn off my pc.
I followed this guide and only saved the .igi file.
Today I wanted to resume it but it also asked for a .igs file, where do I get that?

My 3D model changed a bit in the meantime so that's not an option..

How do I properly pause and resume my render the next time?

Pibuz · Post by **Pibuz** » Fri Apr 01, 2011 10:57 pm

Hi Jasp!

One thing is if you want to PAUSE the render; another is if you want to STOP the render and RESUME it afterwards.

In case 1, to pause the render it is very simple: there's a pause button on top of the Indigo GUI. Use PAUSE if you want to temporarily free some resources on your pc.

In case 2, to STOP and then RESUME a render, you need to follow these steps:
1. EXPORT the scene from your modeling app specifying a name and a path**;
2. Check the SAVE IGI option (you can do this in the Indigo GUI on the run, btw)
Once the scene gets exported, you'll be automatically prompted if you want to render immediately or not. Choose as you wish. During the render, whenever you want to stop the render, click on the stop button and wait some seconds for the igi file to be saved (CHECK TO HAVE THE "SAVE IGI" OPTION ACTIVE in the options dialog inside Indigo). You can now shut down the pc and go to sleep.
If you want to resume the render, open Indigo and select RESUME RENDER FROM IGI under the file menu: choose the igi file saved (you find it in the same folder as the render, same namecode) and then the igs file you exported (it's saved on your specified path**). Then click on the render button, and you're done.

Jasp3r · Post by **Jasp3r** » Sat Apr 02, 2011 1:42 am

Okay thanks for the help, and I have another question.

Is the image ever done rendering?

My sketchup model is currently rendering for 7 hours now, it's a 1600x900 image with 1700 Samples per pixel, but I still see too much grain for my liking.

Pibuz · Post by **Pibuz** » Sat Apr 02, 2011 8:52 pm

Jasp3r, no offense but..do you even know what Indigo is?
UNBIASED render engine means it never COMPLETES a calculation. You stop it at your will.

galinette · Post by **galinette** » Sat Apr 02, 2011 9:17 pm

Hello,

Depending on the scene, 1700 spp may be still noisy. If you could post your image, we may could give you some advice for improving the render time.

The "SAVE IGI" option is not mandatory, you can still save the IGI from the "Save Image" button/menu in Indigo.
Yes, you need not only the IGI, but also the IGS (IndiGo Scene) file to resume your render. This is the file describing all your scene and materials, generated by your modeller plugin, and read by Indigo.

If you do not take care to save it properly, maybe it's still there, if you did not launch another indigo render from your modeller. Start indigo, look at recently opened scenes. It may be there.

Etienne

Jasp3r · Post by **Jasp3r** » Sat Apr 02, 2011 9:20 pm

So will this image ever lose it's grain, by leaving it render for a longer time?

It is currently rendering for 8 hours.

Pibuz · Post by **Pibuz** » Sat Apr 02, 2011 10:37 pm

I guess it will, at least partially.

I assume you didn't use any exit portals, you're rendering with Path Tracing and your whites are 255 255 255.

Please, PLEASE, take a look at the tutorials I've written, such as the SkIndigo FAQ you can find in the sketchup section (seems to me that your modeling app is SketchUp, correct me if I'm wrong..).

When trying to learn a software, you must always take a deep look to the forums: there you will find tips and tricks other users found. This to avoid cyclic repetitions of the same questions. I've answered your questions a billion times, please browse through the forum and look for ALL of your answers. Check my blog too, I post there some tuts in italian, but there are plenty of images

compadrelucas · Post by **compadrelucas** » Sun Apr 03, 2011 5:40 am

If you export a scene from a plugin (skindigo, blendigo, cindigo...), this creates a set of .igs and texture files that allow you to render later on.
When stoping and resuming I found a little glitch that can be irritating.

It seems sometimes Indigo will "forget" the frame proportion, resolution and ssf, and this will create an error that has to do with buffer widths that don't match. (your .igs wants to create an image which is different from the saved .igi).
To avoid this problem it is best to always REsave the .igs from Indigo and discard the plugin's exported scene.

ps: I hope I made myself clear. my writing suckssssss!

galinette · Post by **galinette** » Sun Apr 03, 2011 10:56 am

For sure, using portals and MLT will speed up the render a lot.

Jasp3r · Post by **Jasp3r** » Mon Apr 04, 2011 12:06 am

Yeah, currently using MLT, but I read through Pibuz' Sketchup FAQ and I thought portals were too much work.

CTZn · Post by **CTZn** » Mon Apr 04, 2011 5:27 am

Given your scene, Jasp3r, setting one exit portal up is definitely worth the effort.

Snap its four points to the outer corners of the window opening for instance, making sure that its normal is pointing to the inside and you will save all the light rays hitting the outer walls of your building (including sky rays).

You don't see those currently but, in terms of time you are experiencing their cost

How do I properly pause and resume my render?

How do I properly pause and resume my render?

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