Stange effect in my basket ball

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1

Hi all

I made this test render but I have some strange effect in the bottom of my basket ball, i mean really in the ball and not in the carpet.
I have this efect also in my render with no DOF, maybe from my basket texture that is not so good ??? :smile:

Maybe i should increase some value but wich one?

Any ideas on how to remove this?

This was also my first image with DOF, i can’t say that I understood completelly what i was doing with the DOF parameters but…

Thanks
sergio

2

Stange effect in my basket ball

First, you rendering looks very dark here and to contrastful. Best you set the output at gamma 2.2 … 2.6 and all textures at .45.

I have taken your image a adjust the gamma in photoshop. Now I can see more, but what is the “strange” effect?

Maybe you could place the focus plane a little bit more in the ball. Now, only the front is sharp. I recommend the focus script, to find at the “general useful links” post at the general section.

3

Can you explain better please?

Hi Micha

Thank you for your help but my expirience in Vray doesn’t allow me to understand completelly what you told me so I decided to share the model with the materials to everyone, maybe you or other member can correct it and share it again so I can better take a look at your configs and understand all this gama stuf.

1- I read that to correct the textures i have to put 0.4545 in the material but I don’t know were to put that 2.2 or 2.6 to correct the gama, all this gama stuff still confuses me a bit.

2-I also don’t understand what you mean with “focus plane”??’ what does that script??

Maybe my doubts and with the users help this example can help other like me to better understand the bama stuff.

Here is the link for the model with materials:
http://www.paraglobal-3d.com/downloads/Bola\_basket.rar

Thanks
Sergio

4

Stange effect in my basket ball

Hi Sergio,

here my scene setup. I have changed following:
- global gamma from 1 at 2.2
- all textures at gamma 0.45
- colors changed for gamma 2.2 use (darker now - gap and wall)
- bump map converted to RGB and set at ball material
- texture scale of ball texture from 15 to 12
- black gaps has used no fresnel reflection - fixed now - fresnel enabled
- reflection (fresnel) added to the ball material
- light setup changed a little
- focus changed per script (you can catch a point with osnap and this point will be focused - in the attached file I have create the focus plane per script that show the focused plane - you must delete the plane for rendering.)
- secondary GI at 0.8
- general setup for full adaptive mode per LC-IM

I recommend to read my user tutorial F. Here you find anything I have done at your scene.

www.simulacrum.de/download/Bola_basket_2.zip

Postwork: a little bit contrast enhancement - can be done per Framebuffer curve correction (slight S-Kurve).

640×480 52.6 KB

additional vigentting effect per post work

640×480 52.4 KB

5

Stange effect in my basket ball

The original one is too dark but i think it looks more realistic!

I’ve seen some images made with LWF method and a lot of these doesn’t looks so good, result renders seems to be washed out, with low contrast and saturation.

Maybe i’m wrong, but are you sure this is the best physical-correct approach?

6

Stange effect in my basket ball

Yes, the lighting could be better, but I don’t want to spend to much time at this scene. Only a LWF setup with some additional things.

7

Stange effect in my basket ball

That is when the scene is not correctly adapted. Textures get corrected twice. Moreover, things are going to look washed out and lack contrast when materials are too bright.