Unclear Iray Renders

ps2000

I think we have the culprit and it seems your graphic card runs out of memory. I don't think that the task manager gives a good indication concerning memory usage of the gpu. 

Use gpu-z it gives a better and more accurate overview.

You should also check the log-file of daz-studio under Help>Troubleshooting>View Log File

There should be a nofification if your gpu runs out of memory.

Try to reduce the size (memory usage) of your scene so that it fits on your gpu (max 6gb rather less since your gpu also needs some memory to operate the monitor) by making things not in the camera view invisible.

You could also use a scene optimizer to reduce the amount of memory the scene uses: https://www.daz3d.com/scene-optimizer

Or buy a gpu with a lot of ram, but concerning todays gpu prices that's not really a solution (except you have money to burn). 

oconnordavid16

Here are screenshots of my render settings and also of one of the emmisve lights, are quite a few cars with headlights and police car lights that have this 

rendered another scene last night which was indoor and rendered much faster 

PerttiA

oconnordavid16 said:

Here are screenshots of my render settings and also of one of the emmisve lights, are quite a few cars with headlights and police car lights that have this 

rendered another scene last night which was indoor and rendered much faster 

If you have a lot of emissive lights, I think that is the problem.

DireWorks

definately it not use the GPU

i suggest you to go for the log file in

C:\Users\YOURUSERNAME\AppData\Roaming\DAZ 3D\Studio4 Public Build

open it in notepad delete everything is written and overwrite the blank log

when you open daz studio it will start to write the log in a blank file and you can easily find all the errors you get

now you can open DS and load the scene

probably you will get a memory load exceed error or something which means sthat

in any case you can post the error here and get more help

as i can see its strange with to cars and a ground and probably just a few textures to get out of memory with a 6gb

vukiol

oconnordavid16 said:

Here are screenshots of my render settings and also of one of the emmisve lights, are quite a few cars with headlights and police car lights that have this 

rendered another scene last night which was indoor and rendered much faster 

ah, not only 2 cars :) 

Fishtales

vukiol said:

oconnordavid16 said:

Here are screenshots of my render settings and also of one of the emmisve lights, are quite a few cars with headlights and police car lights that have this 

rendered another scene last night which was indoor and rendered much faster 

ah, not only 2 cars :) 

 I would also say way too much light going by the Lumen setting.

oconnordavid16

Dropped the number of the Lumen liht from 10000000000.0 to 5000000.0  abd it rendered in 2 hours so it seems I had way too much emmisve light with the Lumen settings, the lights a bit dul now so need increse it a little more again as 5000000.0  is too low but just a bit higher should be enough. Thanks for all the help everyone. 

Although as seen in the attached photo there does seem to be some dots on the image 

 

Fishtales

This image has four lights plus the car lights. There are two Point Lights, one Linear Point Light and a HDRI and the car lights are Emissive.

The three lights are rectangles set at 5000 Lumen height and width 50.

The HDR is in a Finite Box set to dimensions that bring it inside the building, Environment Intensity and Map set at 4.

The Headlights are Emissive at cd/cm^2 Colour White, Temperature 4300, Luminance 2600.

Tone Mapping ISO 400 the rest at default.

Click on image for full size.

PerttiA

It's not that much about the Lumen value as it is about the number of meshlights.

Fishtales

PerttiA said:

It's not that much about the Lumen value as it is about the number of meshlights.

 

In what way? 

PerttiA

Fishtales said:

PerttiA said:

It's not that much about the Lumen value as it is about the number of meshlights.

In what way? 

If the number of meshlights in the scene is large enough, I have found that rendering with Iray will drop to CPU, which is logical as the engine has to calculate the effect of each and every lightsource on each and every figure/item/object in the scene.

The "little dots" the OP is talking about are the result of IRAY rendering not being "ready" enough = If nothing is changed, the rendering requires more time to get rid of the dots, or reduce the number of meshlights.

oconnordavid16

In the full scene there is a truck, 9 cars and 7 police cars all with emmissive lights, what exactly is the meshlight? Is there soem render settings I should change to get a better render with no little dots, photos of render settings are in a previous post here 

vukiol

oconnordavid16 said:

In the full scene there is a truck, 9 cars and 7 police cars all with emmissive lights, what exactly is the meshlight? Is there soem render settings I should change to get a better render with no little dots, photos of render settings are in a previous post here 

meshlight its a surface with a light material

there is the post denoiser but you will  loose a lot of details, maybe with a low value but i dont like it anyway

PerttiA

oconnordavid16 said:

In the full scene there is a truck, 9 cars and 7 police cars all with emmissive lights, what exactly is the meshlight? Is there soem render settings I should change to get a better render with no little dots, photos of render settings are in a previous post here 

So, 17 vehicles with how many emissive meshlights per vehicle? I would estimate the total number getting close even if not over 100 pretty quick... That is a lot of light sources, which will make the rendering take a long time, even if it did fit in GPU VRAM , if it doesn't the time it takes goes up to several hours. The little dots in the render are just an indication of the render not having run long enough.

oconnordavid16

PerttiA said:

oconnordavid16 said:

In the full scene there is a truck, 9 cars and 7 police cars all with emmissive lights, what exactly is the meshlight? Is there soem render settings I should change to get a better render with no little dots, photos of render settings are in a previous post here 

So, 17 vehicles with how many emissive meshlights per vehicle? I would estimate the total number getting close even if not over 100 pretty quick... That is a lot of light sources, which will make the rendering take a long time, even if it did fit in GPU VRAM , if it doesn't the time it takes goes up to several hours. The little dots in the render are just an indication of the render not having run long enough.

I set the max time thing to 0 though  

oconnordavid16

vukiol said:

oconnordavid16 said:

In the full scene there is a truck, 9 cars and 7 police cars all with emmissive lights, what exactly is the meshlight? Is there soem render settings I should change to get a better render with no little dots, photos of render settings are in a previous post here 

meshlight its a surface with a light material

there is the post denoiser but you will  loose a lot of details, maybe with a low value but i dont like it anyway

I see, the surfaces of the headlight bulbs and police car lights are what I have with emmisive lighting using Luman, think maybe I jsut had it way too high