Wierd light leak that I can't figure out

V-Ray for 3ds Max V-Ray for 3ds Max :: General
1

I am confused. I am getting a very strange light leak under the eaves of this roof. As you can see, the roof continues well past the wall, there is no hole. I have tried moving the top of the wall above, inside, and below the roof, but nothing seems to change this error. Please advise:

2

try:
1) set vray shadow to 0.01
2) reexport your scene into a clean one
3) make sure your object/shader is double sided.
4) check your min leaf size (make sure its 0.0) check your face/level coef(maybe less then 2.0)

3

I had something similar to that happen to me once and what was causing it fo r me was that I had the secondary rays bias higher than zero. I never did figure out why it happned, just that when I put it back to zero it rendered fine.

4

There are two reasons for this to happen:

1) Your shadow bias is more than 0.0 (it is by default); setting this to 0.0 solves the problem.
2) Your secondary rays bias is more then 0.0. Again, setting it to 0.0 solves the problem.

Best regards,
Vlado

5

Well, setting the secondary rays bias to 0 is the only thing that worked (vray shadow bias didn’t affect it at all). Thanks guys. I just hope this doesn’t introduce problems elsewhere in the model (its very very very big).

Now about some red dots… :lol:

6

Vlado said that to fix red dots check apply cropping on the maps materials of which produce red dots.

7

reading all this above i wonder what is the use of a ray bias not equal to zero anyway?

I am not quite sure if i remember it right but wasn t it to avoid other (shadow) artifacts?

regards

Andy

8

Yeah, I know :wink: was trying to make a joke. I actually do have red dots, and know what to look for to correct them, but its gonna take a while. Very big scene with a lot of mats.

9

maybe an obvious question, but have you tried rerenders apply bitmap cropping script?

10

It fixes the problems that show up when you have coplanar faces

11

might be dumb question but…and i heave heard this before (im esl so) whats coplanar?
lol

12

coplanar is when you have two faces in the same place in 3D space

Like if a box is sitting on top of a plane, the bottom face of the box and the plane are coplanar

13

i see…thanks

14

I have, and I still have overbright warnings and red dots, gonna take some more digging…joy :roll:

15

try this script

do()
     on.Procedure
Begin
       Convert >all.Obj GetNumsubs ()
to
Maxwell;

init.Render;
end()

16

:lol: :lol: :lol: :lol:

Morbid_Angel 17

:smile:

18

By using that script, wouldn’t you also have to use this script?

if HellFreezesOver=1 then print “render complete”
else print “please wait”

19

your syntax is wrong, it should be:


if HellFreezesOver() = true {
   if rand(1,100) = 50 {
      echo "Render complete";
      end;
   } else {
      echo "Please wait";
   }
} else {
   echo "Please wait";
}
20

lol nice

-dave