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Render issues?
show user profile  tajisingh
Hello there, I have an issue with something I've been working on, for some reason when I render out a single frame, the shadowing is straight, almost blotchy or pixellated in areas. However when I create a similar room in a new file, the shadow and lights are perfect. Can someone tell me what the issue might be in one of the pictures so that I can understand this problem and fix it?

Problem File

New file with identical settings (missing couches, table and fish tank)

read 243 times
12/3/2011 8:55:34 PM (last edit: 12/3/2011 8:55:34 PM)
show user profile  beezy
not sure personally, but it might help to state which renderer, lights, and exposure's you're using. The 2nd image still has a problem too, are these renders using high samples?

somebody else might be more helpful, sorry

read 232 times
12/3/2011 10:08:45 PM (last edit: 12/3/2011 10:08:45 PM)
show user profile  tajisingh
Oh, my bad, I'll fill in the info.

It's mental ray renderer, the lights are mr sun (multiplier 10, softness 32) and mr skylight (multiplier 10) with a mr enviroment.
The windows have two mr sky portals (multiplier 10, shadow samples 64).
The walls are autodesk wall paint (ambient occlusion 16).
Also Final Gather is turned on, at medium.

I'm not sure what you mean by exposure, unless that's somewhere to be found on the program, I'm a novice so this is really troubling me, also I hope I've told the right things that I'm using?
read 228 times
12/3/2011 10:40:17 PM (last edit: 12/3/2011 10:40:17 PM)
show user profile  Garp
Not an mr user but what strikes me is that I don't see any sunlight in your first render.
Are you sure mr sun is on?

read 222 times
12/3/2011 10:58:01 PM (last edit: 12/3/2011 10:58:01 PM)
show user profile  tajisingh
Oh, crap. I'm sure mr sun is on, but I think it was much lower that time I rendered it, but just in case I'm rendering another image with a much higher sun position now.

I'm still wondering why that light blotch is on the wall and some of the area near the table floor and the couch to the right too.
read 219 times
12/3/2011 11:06:09 PM (last edit: 12/3/2011 11:06:09 PM)
show user profile  digital3ds
it could just be the material, i find it helpful to test lighting and shadows with a standard material overide on all objects... it also looks like your soft shadow precision is pretty low. try rendering a region with the settings bumped way up. another thing you could try is switching the render filter from box to mitchel or something
- Mike Sawicki

read 213 times
12/3/2011 11:22:19 PM (last edit: 12/3/2011 11:22:19 PM)
show user profile  tajisingh
I tried upping the soft shadow precision. And it looks damn awesome now! But 30 minutes for one frame... I guess there's no escaping it. I guess I have to experiment with the soft shading and settings in the rendering window to get acceptable shadows and decent overall render :/
How do you change the render filter from box to mitchel?
read 209 times
12/4/2011 12:09:24 AM (last edit: 12/4/2011 12:09:24 AM)
show user profile  tajisingh
I guess it was the soft shadows setting. Thank you digital3ds! :D

read 201 times
12/4/2011 1:23:54 AM (last edit: 12/4/2011 1:23:54 AM)
show user profile  digital3ds
render setup > renderer > sampling quality > filter type. keep in mind that this will also increase your render times. Boost the settings and let it run while u sleep!
- Mike Sawicki

read 199 times
12/4/2011 1:28:02 AM (last edit: 12/4/2011 1:28:02 AM)
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