shellac material fast/slow?

[andrewjohn81]

I was just wondering if anyone knew of problems with this material in vray, and wether it was alot slower than a standard material.

obviously, if it has two reflections, then it's obviously a bit slower, but I was wondering if it was exponentially slower, twice as slow, or just a little slower.

Any experts out there know this one?

[Candelero]

The Shellac material is coded so that it contains 2 materials in itself.
So, having 2 VRayMtls with reflections would cause V-Ray to trace twice the rays, which hit the object.

If the <<Shellac Color Blend>> value is 0.0, then V-Ray will trace only once.
Otherwise it will trace twice.

Value = 0.0


Value = 50.0


Shellac material contains 2 VRayMtls with reflection.

Consider that having 3x rendertimes, is not going to be always as it all depends on the scene itself.

Best regards,
nikki Candelero

[Buck]

aside from being a bit slower (which is to be expected, as Nikki pointed out), I have never run into any problems using shellac materials. Infact I have even used multiple nested shellac materials, all with Vray materials inside with no problems.

[Morbid Angel]

yeah...imo shellac is good, but blend mat is terrible for that. Never try to do blend between two refractive mats its a suicide.