4K res is costing me 20H to render, will 1080P or 720P turn down render time?

xXQuatroXx

Hi all,

I'm still pretty new to Daz but i'm getting more and more grib on things.

Fanlly got some nice stuff rendering at the moment.

System is a bit laggy though but probbebly due to a fact that im using 2 monitors on the same graphics card (MSI GTX 970) thats rendering in Iray now.

But that not part of my question (but any solutions, are welcome. Probebly something like, use onboard GPU or buy a low cost second graphics card)

Question is:

Im a fan of real sharp and good quality.

So i'm reding in 4K Res. and my rendering times are 20H or more. (after 20H some pics still contain little grain, and we all don't like grain in our pics do we )

Given the fact that im using a GTX 970 (4GB - 1664 Cores) mean it's a bit slow and using outdated non pascal cores i might be pushing the GPU to it's limits?

I'm seeing i'm on the egde where the scene i'm rendering some times wants to use CPU (i7 4970K) instead of GPU.

Does falling back to 1080P rendering or Less 720P improve rendering times? or is it a process that always long every time and doens't matter what kind of Res you choose?

And if it does, how much rendering time will it improve if i render at 1080P / 720P?

Thanks in advance  

 

jag11

Lowering resolution definitely does help. When possible try avoiding translucencies also helps a lot. That's for reducing time.

To decrease memory usage, if possible use HDRI, if you use a scene frequently, create your own HDRI using a camera with spheric lens distortion.

xXQuatroXx

jag11 said:

Lowering resolution definitely does help. When possible try avoiding translucencies also helps a lot. That's for reducing time.

To decrease memory usage, if possible use HDRI, if you use a scene frequently, create your own HDRI using a camera with spheric lens distortion.

Thanks jag11 but this raises some other questions here 

As i said im realy new to the scene...

so as far as translucencies go, uuhhmmmm..... ? please explain? what are those and how to avoid.

HRDI, i've red something about it and there is one HDRI that comes with daz standard right. the Ruins HDRI?

So here is the thing, im using an indoor scene and leaving the seling on, there is a bath tub with water and i don't want to have any outside reflections, so lets say leaving the celing off will let other lights (from sky) come through and relfect on the water (and glossy body). 

So what is best pratice here? what would be the Enviorment settings to use with HDRI and how will it effect my curren't light setup?

Thanks again

jag11

By translucencies I meant surfaces like Skin, so if you are rendering a skin close up, translucency is a must, otherwise it's unnecessary. But in the case of water is a must all the time.

So, if you don't require translucency, you must adjust the Translucency Weight to 0.

JMC said:

HRDI, i've red something about it and there is one HDRI that comes with daz standard right. the Ruins HDRI?

Correct. There are lots of sites with free and paid HDRIs that provide distinct lighting or mood.

JMC said:

So what is best pratice here? what would be the Enviorment settings to use with HDRI and how will it effect my curren't light setup?

Actually what you are doing is what most of user do, hide walls or ceiling to let light in. As for the environment settings just keep intensity value to 1 (Ruins come with a default value of 2) unless you need a stronger environment light. You'll need to adjust the exposure value to adapt to the HDRI lighting.

HTH

xXQuatroXx

I meant im leaving the seling on.. i dont want to hide other walls or sealing. As the water reflections will reflect on the hdri when there is no seling. And i dont want any outside reflections. The seling above the tub have 6 spot light inbedded in the seling it self. This came with the envirement. So no other light like spotlight or point light needed. So what would be the point of adding hdri in this closed envirement? And about the tranlucencies, so without water but close up on the model in need to put the translucencie to zero do i have that correct? When zooming out tranlucentie isnt needed. Correct? When using water, even when model isnt up close translutentie is needed. Correct? How many translucentie settings are there? Is there a main translucentie slider for all settings? Im glad for al the help you have given me thus far. Thanks again.

jag11

Oh, in that case there's no point in adding an HDRI image.

If you were to shoot a portrait close up you'd need to keep character presets as default, assuming character comes with iray presets.

Exactly, when zooming out, translucency isn't required unless you want to highlight ears and fingers translucency.

Every scene object (prop or actor) has its own defined surfaces and each surfaces has a property to control translucency, there is no main translucency slider, each surface has its own.

BeeMKay

Just wondering: Are you sure you are still rendering on your GPU, and that the system hasn't switched to CPU? I'm asking because your card has 4GB and you are running the monitors on it... and two or three characters in a scene can easily be "too much", depending on settings.

xXQuatroXx

Yeah its still on the gpu i've been constantly watching the log file after each render. But i dont have the second monitor on all the time and when i start my render for full run i do this before i go to sleep and turn of the monitor. But can see my card is beeing used. (Temp setting of my msi temp window) and also when my monitor is on and rendering and only showing desktop there is quite a lot of lag. But as soon as i open another window like explorer the lag is gone.

xXQuatroXx

So boughts a gtx 1080 ti together with a 980 ti now. Monitors run on the 980 ti and if the scene isnt bigger then the gb on the 980 ti then the 980 ti will support the 1080 ti in rendering. Been working with the for a month now and its amazing! Such quick renders in 4k with under 5 min. Depending on whats in thr scene ofcourse... just an hdri and 3 lights and a floor with reflection and Dsub on 4 with out having to use a scene optimizer tool...its amazing! And much much more fun to do now... Its was a huge investment butall things conciderd a good investment. Pc doesnt need to stay on that long so power consumation is also perfect now. Im happy!! Thank you all for your support