Blinn e ward shader bug?

[cecofuli]

Hi Vlado,

i send you the .max file, but i write here for the guys with the some problem.

I've rendered an animation, with glossy floor and blinn shader. In some frames, i've a white spot. With ward the same problem and no problem with Phong.

TEST

TEST

Thank's

cecofuli

[pjkw]

Sounds like a specular problem, in my experience speculars does more harm than good in vray, with blinn being the worst, try unlinking the specular glossiness from your reflection glossiness so specular glossiness is set to 1, or turn off specular on all your lamps.

[cecofuli]

Hi,

yes, it's specular problem for me. The solution? To use a Phong shader. In this way, there aren't no spot in the floor.

bye

cecofuli

[PIXELBOX_SRO]

lets hope BRDF gets better in versions to come..in my opinion it is still not sufficient

[cecofuli]

Hi vlado,

any news?

thank's

cecofuli

[vlado]

Yep, select the small lights around the sink (for example, VRayLight12, VRayLight18 ) and set their cut-off threshold to 0.0. This will fix it. I suppose that some sort of gradual falloff for the cut-off, rather than an abrupt edge will be better for cases like these.

Best regards,
Vlado

[cecofuli]

Hi Vlado,

thank's for the tips! For this project i solve to use a phong. But for next, i know how fix this problem.

Bye

cecofuli