[Music]
hello
and welcome to our how-to tutorials for
v-ray
in this tutorial we demonstrate how the
parameters of v-ray fastest css2
material work together
to get a color translucent plastic
shampoo bottle
let's start by assigning a very fast
success material to the bottle
i'll rename it to translucent plastic
for ease of use
first we want the bottle to be
translucent so let's look at how we can
get this effect
set the color mode to scatter
coefficient and for color
this mode is designed for translucent or
refractive materials
next change the single scatter mode to
raytraced refractive
to introduce refractive properties to
the material
for the proper work of very fast success
material
we need to set the correct scatter
radius value
for the bottle in the scene we set it to
one centimeter
the thickness of the bottle geometry is
a little less than one centimeter
it is also important to see the right
index of refraction
the index of refraction defines how the
material refracts transmitted light
air has an ior of 1 by definition
which means it is no obstacle for light
transmission
cosmetic plastic bottles are commonly
made out of pet
so we use ped dior here
which is 1.575
feel free to experiment with different
plastic ior values to get the desired
look
let's render and see what we
accomplished
the liquid content is seen clearly to
match the bottle color to the color of
the cap
we can play with the scatter coefficient
in full color parameters
in general lighter scatter coefficient
color
makes the object look more opaque while
darker colors
make it more effective
at the same time black folk color makes
the material fully refractive
but any dark color other than black
makes it opaque
i'll set the scatter coefficient to
light green and the faux color to dark
green with a yellow tint
to give the bottle some density
okay the color looks good and the bottle
is still transparent
next let's enhance the reflections the
specular layer
controls the reflections or the specular
component of the material
increase the specular glossiness to 0.75
if we look at how light travels through
different media
we realize that plastic as a volume
behaves like a rigid body
the light scatters mostly backwards
through it
and for that we need to change the phase
function to minus 0.5
the glossiness highlights are better
pronounced and emphasize the curvature
of the bottle
the overall look achieves the plastic go
the bottle is not as glossy as glass
yet it is not as soft as rubber we are
ready for the final step
enable the scatter gi option this makes
the material scatter global illumination
more accurately
especially for translucent materials
such as ours
then increase the refraction depth to
eight
the more we increase this parameter the
more ray bounces we get inside the
volume
i've got a blend material prepared with
shampoo labels for the bottle
so i'll add the translucent plastic
material we created as a base
and render
thank you for watching this tutorial on
how to make a plastic translucent
material
with v-ray for maya