Bump map BUG

V-Ray V-Ray for 3ds Max Issues
1

Hello guys,

We ve got a strange bump map issue here. Havent tried it with SP3 yet, but were getting it with SP2 on max 9, max 2008 and max 2009.

Here is the description:
When we create a scene using meter units we encounter quite a troublesome bug on bump mapped materials in the areas where there r direct shadows.
You can easily see it on the picture below. It doesnt matter if we use sun or direct light or if we tweak bump map filtering and blur etc…the bug persists
On the other hand, when we use mm units system, the bug is not present.
however…because of this bug, we cannot creat large scenes..

Please have a look at the picture below:

888×1080 195 KB

can anyone help please???

Thanks a lot

Best regards

2

What is your shadow bias set to in the light settings?

Best regards,
Vlado

3

ha…vlado :))))))

you solved it :slight_smile: we ve had it to 0.2m :slight_smile:

thanks a lot!!! youre the man!

best regards

4

it is only strange that without bump map it works correctly even with a shadow bias se this high

any idea why?

5

It is because the shadow bias causes the shadowed point to be moved along the surface normal; the bump map changes that normal, so the shadows are sampled at very different points depending on the bump.

Best regards,
Vlado

6

right …great to know that Vlado thank you !

7

I like depth map shadow :smile: