Ward and Anisotropy

[francomanko]

Hi,

I guess i dont understand how ansiotrophy works but i made a simple scene, sphere, hdri dome light and set the ansio setting to -0.95, rotation 0, as in the documentation and get this result..which to me seems wrong. This is in vray 3.6 and next, so i guess its me thats wrong. But can anyone clarify as i just cant seem to get nice results when trying to get brushed metal and go around in circles a bit. Feels like im at square one every time i try.

Thanks in advance.

[francomanko]

ive attached a video and project file, something going nasty when there is reflection glossiness and the ansio hits the -0.95 mark.

[damaggio]

I'm not getting this result. 3.60 CPU but it does happen in Cuda. no UV cords plugged in.

[francomanko]

i still get it with cpu and with a place2dtexture node assigned to the uv

[francomanko]

so can anyone from chaos confirm if this is a bug or something im doing wrong?

[Muhammed_Hamed]

It doesn't happen on CPU for me in Next Beta 3. It only happens on GPU
This is definitely a bug, but why are you using ward?
GGX is way faster and you can get the exact same result with it. Use GGX tail falloff of 1.1 to 1.4 or so
At some point Chaos Group will drop Ward and blin I think.
Do you have a reference that you are trying to match?

[francomanko]

hi thanks for reply, ah i didnt realise the ward could be repro'd with ggx...yeah the image is this .

I always struggle with close ups with brushed metal. I get most of the way but never happy with it

[Muhammed_Hamed]

GGX tail falloff is very powerful for metals!
You can add a worm tint to reflection color, then use Vray dirt to add these scratches in the reference photo
Let me know if you need help with it.

[damaggio]

I thought you were trying to do something more complex, in fact this is really easy to do as mentioned by Muhammed using the new GGX or the Ward.
Here's my lame example with brushed metal map into Spec only.
Thanks for your scene too Muhammed.
Have fun now.

[francomanko]

yeah thanks for the replies, and the scene much appreciated..I think i just keep tweaking and tweaking. Yeah i feel a little embarrassed at it not being complex, but i think i just find myself chasing my own tail at times, always expecting my efforts to look better.

[francomanko]

Hi, just wanted to say thanks again...im getting there

[damaggio]

Wow, it came out awesome, just like the reference.

[Muhammed_Hamed]

Looking really good!

[francomanko]

thanks for that