LWF and quality of rendering

[mibs_studio]

Hi all,

 

Probally this LWF thing has comes up so many times. Just simple question, I have adobe to do my work in LWF and it works fine except there is some portion of the rendering have a lot of noise especially in the dark area and reflection surface. As i get it, it is because actually the area i`m looking at is much more dark if i`m not using the LWF. So to avoid this, i should have better sampling. But sumtimes its to high but the problem remain the same.

 

My question is, if I`m using LWF what the best sampling setup is the best? starting from the AA, GI and DMC sampler... Thanks ya

[WAcky]

Post your settings so we have somewhere to start.

 

You shouldnt be doing your gamma corrections in post. You're asking too much of the image and this will introduce noise. you need to setup max and save out your renders correctly.

 

Take a look here and see if you're following these settings.

[nelpiper]

If you want to work with LWF, I think your best option would be saving your files to .exr format (floating point 32bit). With this format, when you take it into photoshop, you have much more control over exposure. It gives total liberty to work on the shot without having burned out areas. Good luck

[johnvid]

If you are doing LWF workflow, did you change your RGB Values on each material to 0.255 or there abouts.. I have had the same issue too, where the noise in the shadows is the samples not being devided up enough & what looks like no AA.

 

After reading many posts about LWF, my assumptions where quicker render times, more shadow detail...but if you have to up the sampler rate to compentate for the noise then the render times fall again. So what can you do, hmm well still working on that...but as I am working with float images, what I have decided to do just recently is up the power of the main light, adding more light means brighter shadows(still experimenting, may need to up the GI), and maybe less noise..and then if I need to I can bring the exposure down, but more often than not I find I am always increasing exposure in the EXR...and to make the shadows a little darker to hide the noise I have also dropped the 0,0 point in the curves in the VFB to below zero.

 

I too always wanted some detail in the shaded areas, but if you are trying to simulate a photograph, light in the the shaded areas can mean your sky is overblown, and while that may be how it would happen in real life, its not usually what the client would want it...

 

So we end up doing the things we would do in camera if we could, different exposures combined to make the perfect image.

 

More tips needed