I see lots of difference between images in viewport and render output, can anyone explain why? This is second time im getting it, and i cannot find the reason.
I'm on H12 12.0.543, win64.

PS: Is there any way to render a sequence and view currently rendering frame in render view?

hi,

check if the “preview” checkbox is enabled in the render view. \
it changes the render settings no matter what your mantra settings are, the online help will explain better what and why.

as per the sequence just render the output to an Image Viewer?

Preview is enabled, but turning it off changes nothing, i'm still getting that yellowish noise. Actually it somehow linked to envLight in the scene(envLight has beige cast), without it everything is fine, well, except the fact that i don't have fake gi lighting now.

As for the sequences: i mean - is it possible to set mantra to render the sequence to files as normal, but monitor what you getting on output in render view, or something like that. The same way it's done in, say, XSI.

PS: I had the same effect while ago, and iirc there's also was involved envLight: http://www.youtube.com/watch?v=ABWDUOtsOMs [youtube.com]

I am failing to see the problem/error. In the render view you don't sample the env light as much as in the final render, hence when a sample hits a very bright spot of the hdr it can have a huge impact on that pixels value and therefor you get the noise.

Ehmm….the problem is that in render view image looks better than in file output. I'm not using HDRs at all.

Anyhow, it's not about the setup, i cannot understand why using the same ROP i'm getting different results in render view and in file output?

Ahh, I totally switched the pictures in my head. Still looks like a sampling issue tho.

What renderengine do you use for the render output? MicroPoly, raytrace or pbr?

it's simple, you use micropoly engine by default, thats why you get blotchy render when you render in mplay, however when using renderview, the preview button forces mantra into raytrace mode and in raytrace mode the lights are much better sampled by default, so you get a nicer image.

if
you turn off the preview checkbox in renderview, you will get the same thing, the blotchy one.

buki is right, switching to raytrace in mantra1 rop produces nice smooth renders, while turning off preview introduces undersampling artifacts.

I found that lights is ok in micropoly engine with something like 24-32 samples in envLight node.

Thanks guys.

And still 2nd question left: is it possible to render both to “ip” and to file sequence, to monitor the output?

i think you can only render either to ip(mplay) or to disk, not both at the same time, but you can always save your sequence from mplay

buki
it's simple, you use micropoly engine by default, thats why you get blotchy render when you render in mplay, however when using renderview, the preview button forces mantra into raytrace mode and in raytrace mode the lights are much better sampled by default, so you get a nicer image.

if
you turn off the preview checkbox in renderview, you will get the same thing, the blotchy one.

that's pretty much what I meant, sorry I didn't added about the raytracing thing although the help page would have pointed that out first thing

I'm interested to know if that fixes the problem because I'd like to know otherwise if this is something different.

cheers

Yep, rising the samples on both light in the scene to 16-64 totally fixes that “glitch” for micropoly engine. Rendering test right at this moment on workstation.

I prefer increasing Shading Quality when rendering with MP instead of going crazy with the sampling on the env and area lights. It usually gives a quicker rendertime with the same result.

Thanks for tip, gonna try it today.