Graphics Programs Reference
In-Depth Information
5. Save the file as
start_14.blend
.
How it works...
Put simply, the gray-scale values of the texture are multiplied for the value we put
in the second slider of the
Math
node. For example, if we set a value of
0.500
, the
intensity of the effect will be the half of the default one (1.000 x 0.500 = 0.500). With
a value of
3.000
, the effect will be three times the default one. Similar to Blender In-
ternal, the value can also be set as negative (
-3.000
in this case), thereby inverting
the direction of the bump effect.
Note that there is an evident problem at the terminator of the spheroid (that is, at
the limit of the lit surface with the self-shadowed one) that seems as a general limit
of path tracers. To get rid of it, you can try to subdivide the mesh by a higher value
(a little impractical method, honestly), but this not always is enough. A different way
is to modify the
Size
value of the lamp (or the scale if you are using a mesh-light).
Select the lamp in the
Outliner
, and in the
Size
button under the
Type of Lamp
row
in the
Object Data
window, set
Size
to
1.000
. The terminator looks a lot smoother
now (along with also, obviously, the projected shadow on the plane):
