IRay Rendering issues

JDeerTay

This is a fairly odd issues I cannot seem to figure out.

Ever since this morning, all of my scenes (which have been untouched with regards to settings) are not rendering right. By that I mean what would usually take 1-2 hours for an HD render are now ending in 20-60 seconds and are spotty. It is almost like my GTX1080 Ti is not kicking in. Normaly I hear the fan turn on. (Before you ask I have rendered since my last driver update and the card is working fine as I played BlackOps4 this morning). It is a new PC, but I did go through everything and ensure all my hardware is working. Temps are low as well. 

I even switched to CPU  render and its doing the same thing. 

I have searched the forums and tried the suggestions for playing with the samples, etc. but nothing is working. Only when I switch from photoreal to interactive does it seem to do anything, but then I get a weird green highlight on my characters forehead. 

I had a few renders last night no problem. This morning? All duds.

Richard Haseltine

What are the settings for your renders? They will normally load with the scene (assuming you open rather than merge it), but it is possible to turn that off in preferences.

JDeerTay

Min Update 1

Update Interval 5

Min Samples 5

 Max Samples 5000

Max Time 7200

Quality On

Quality 1

Ratio 95%

 

These should all be default. 

magog_a4eb71ab

1-2 hours with a GTX 1080 Ti? Wow! You must be shooting some heavy-duty scenes! I'm getting a 1080 Ti in my new desktop when I order it. I'm hoping it improves my Iray render times dramatically compared to what I'm getting now with my laptop's GTX 765M. Just rendering a character in a bikini or shorts with ground texture and a "wall" behind them takes me around 2 hours in 1440p res and 4-5 hours in 4k res using default render settings.

I'm curious, are you using any "RSL" components in the scenes that you try to render in Iray? I remember when I contacted their tech support a while back about similar rendering issues, they had instructed me to make sure that I'm not using RSL components for Iray or MDL components for 3Delight. I went through my scenes again and made sure I either used all MDL or RSL(depending on which renderer I was going to use), and then no more shut-downs occurred. Your system is probably a lot more robust than mine, so I would expect your system to just end the rendering prematurely before reaching a point where it just shuts down. It's just a guess on my part though. I would imagine with the much more complex scenes, it would be very easy for someone like me to mess this up, lol.

The only time I ever have really fast render times like the ones you've mentioned is when I use 3Delight, but I don't think that would be the culprit, because the 3Delight renders tend not to be "spotty". By "spotty", I'm assuming you mean "pixelated" where some of the pixels are white/black or some other off-color due to not having been drawn fully. I've included an example in the attachment of a cropped image that was rendered at 4k res which I had stopped prematurely after about 2 hours of waiting. Lots of pixelation/spotting in it.

 

LiquidWarehouse

1-2 hours on a 1080ti isn't hard I'm finding I struggle fitting things into the 11GB of ram on the card. That's about 5 characters mix of gene and gen8 and some scenery, some wardrobe options are very heavy on memory though

JDeerTay

magog_a4eb71ab said:

1-2 hours with a GTX 1080 Ti? Wow! You must be shooting some heavy-duty scenes! I'm getting a 1080 Ti in my new desktop when I order it. I'm hoping it improves my Iray render times dramatically compared to what I'm getting now with my laptop's GTX 765M. Just rendering a character in a bikini or shorts with ground texture and a "wall" behind them takes me around 2 hours in 1440p res and 4-5 hours in 4k res using default render settings.

I'm curious, are you using any "RSL" components in the scenes that you try to render in Iray? I remember when I contacted their tech support a while back about similar rendering issues, they had instructed me to make sure that I'm not using RSL components for Iray or MDL components for 3Delight. I went through my scenes again and made sure I either used all MDL or RSL(depending on which renderer I was going to use), and then no more shut-downs occurred. Your system is probably a lot more robust than mine, so I would expect your system to just end the rendering prematurely before reaching a point where it just shuts down. It's just a guess on my part though. I would imagine with the much more complex scenes, it would be very easy for someone like me to mess this up, lol.

The only time I ever have really fast render times like the ones you've mentioned is when I use 3Delight, but I don't think that would be the culprit, because the 3Delight renders tend not to be "spotty". By "spotty", I'm assuming you mean "pixelated" where some of the pixels are white/black or some other off-color due to not having been drawn fully. I've included an example in the attachment of a cropped image that was rendered at 4k res which I had stopped prematurely after about 2 hours of waiting. Lots of pixelation/spotting in it.

 

Yea, I am doing HD scenes. I usually can do a 1-2 character 4k scene in a few hours with my setup. 1 4k closeup on 1 character inside of 30 or so minutes. Just kind of depends on lighting. I deffenatly think a new card will help you out, but I'm not really an expert!

 

Yes, the scenes would be pixelated like you mentioned. Mine looked like that, with slighlty more white spots and took all of 20-35 seconds. I ended up deleting the scene and things seem to work. I think I might of had a 3Delight item in there as you mentioned. It was a good tip.