Strange shadow computing in corners

[PIXELBOX_SRO]

oooooohoooooo....
that is just great morbid angel!!!!! thanks a lot ))) i owe you

so all the other settings in IRRAD map were left intact or have u reduced the thresholds as well there?

[Morbid Angel]

oooooohoooooo....
that is just great morbid angel!!!!! thanks a lot ))) i owe you

so all the other settings in IRRAD map were left intact or have u reduced the thresholds as well there?

I didnt touch anything else. Except the paramiters I posted. And also, your DMC sampler noise thresh was set to 0.001 which was way too low, so I set it to 0.01. Thats it.

You can probably get even more accurate gi, if you play around with irmap a bit more. But I think this is good enough.

[RErender]

here is result:



settings were:

irmap:

-2/0
80/20

LC:

1000
screen size 0.02
prefilter 30
interp samples 20

thats it.

Typical resulotion for such scenes: take some steps back. First thing I did, was to switch both gi's to light cache ppt mode. After few minutes I saw that there were a clean gi solution. That lead me to believe that there was a problem with an irradience map/lcmap setup. I then tweaked the existing settings somewhat. Mostly the section of -2/0. That is important when you have such large indirect bounce; a precision of gi is affected. By setting irmap samples to be -2/0 you ensure the precision and thus remove error.

Hmm, I was able to get it to clean up to that point, but if you look there is still a lot of splotches on the flat areas of the wall. Blurring the solution like you have helps but there seems to be some underlying issue. It is very apparent when the irmap is being calc'd. My guess is that there is something weird with the geometry in the scene.

[PIXELBOX_SRO]

those boxes r newly made solids though...so how could those be corrupted..
or
r u saying that one corrupted object could have such a vast impact on the whole scene? ...there is a slight chance there might be an unwelded vertex in the interior walls, but the question is would it really do this?

i will try to remodel the interior walls once this project is finished but i doubt it will change anything...

...maybe yes who knows, but am just afraid of spending whole day on remodeling it with no sufficient result....

[PIXELBOX_SRO]

i remember there used to be probs like this whan some cad stuff was present in the scene , but there is no such thing

[fourthand11]

Under Irradiance map try setting your Interp. samples to 50 or 60. Should clean up those splotches.

[Morbid Angel]

so I think the problem goes deeper then just simple irradience map settings; I have rendered the region in question with pure brute force. Result was somewhat piculiar:
Around the edges of the sealing qmc has produced artifacting, which is unlikely for this method of gi. Artifacting was much like bad irradience map, not as obvious.
It seems to me the error in computation, when obvious as such is due to error printed by vray (about scene bounding box being too large).
I can recommend scaling the entire scene down.

[PIXELBOX_SRO]

ah ..ok....whats the best way to do that?
sorry for my ignorance but i have never ever done that with the whole scene
Select all (including vray cams and sun) and set scale to 1/10th?

wont just converting the scene to meters help?
system and display units?

wont it affect any possible objects merged in later on? the scaling?

sorry for dumb questions i really appreciate your help

[Morbid Angel]

ah ..ok....whats the best way to do that?
sorry for my ignorance but i have never ever done that with the whole scene
Select all (including vray cams and sun) and set scale to 1/10th?

wont just converting the scene to meters help?
system and display units?

wont it affect any possible objects merged in later on? the scaling?

sorry for dumb questions i really appreciate your help

best way?...open new scene, create a dummy, x-ref your scene into it and link to that dummy. Scale the dummy. Import the x-ref. Done.

Unit conversion, I tried it, but somehow it didnt work.

[PIXELBOX_SRO]

oh dear ))) hahhaa...ok will give that a go...thank you very much for your help

thank you all guys

will post some results once all cleaned and once it will be equipped

best regards

[vlado]

You can get problems like these if the walls do not have any thickness, or if the shadow bias for the sun light is too big causing the shadow to skip objects.

Best regards,
Vlado

[PIXELBOX_SRO]

will have to inspect the geometry once i get back to rendering interiors...