Bump bug ?

[Chakib]

Hi guys,

I was testing  one of my latest scenes, and i did use the latest  legacy daily build in dropbox,  i've found a new bug in the floor's bump i didn't understand but here are some renders to explain :

No Bump :


Bump 0.1


Bump 0.05


I don't know if it is some weird reflection distance or something else...

[Chakib]

I've found also that using other bump textures do produce this bug when i increase the bump value juste a little bit.

[maru]

By this 0.1 and 0.05 you mean bump strength or bitmap's blur?

Where is your light source and what is it?

[Chakib]

By this 0.1 and 0.05 you mean bump strength or bitmap's blur?

Where is your light source and what is it?

Bump strength, the bump blur is 0.2

i use  hdri map + 1 rectangular corona light

[maru]

And what happens if you set blur to 1.0?

[Polymax]

Can give the scene?

[Ondra]

Looks kinda like the good old excessive bump bug. Can you give me the scene?

[Chakib]

I'll prepare the scene very soon.

[Chakib]

i did test the value 1 for bump Blur  and it doesn't help the same bug is here.

[Chakib]

Here is the scene :
https://www.dropbox.com/s/5wq146ouw1mew2j/bump%20bug%20scene.zip

[Polymax]

Here bump = 0.03, blur=0.2. Looks very good!

[Chakib]

Here bump = 0.03, blur=0.2. Looks very good!

try 0.05 ! it's not normal.

[Polymax]

You may set "Max normal dfference" to 0.1 and use bump = 0.1.
But for the bump while there are some limitations in the upper limit of value.

[Chakib]

It seems that MAx normal difference 0.1 works here



but i don't understand how to configure it depending on the value of the bump, is it a work around for a bug or a correct way or what?

[foxid]

bump gives really strange results...