Metal Shaders IOR
The Index of Refraction plays an important role when creating a physically based material. Therefore, it has to be considered as part of the shader. The site ReflectiveIndex.info is a great resource for understanding the proper IOR of different materials. However, inputting those numbers into a V-Ray shader will not match exactly. As such, Vlado has created this chart to help make the translation easier:
|
Name |
|
Base (diffuse) color |
|
Reflection color |
|
IOR |
Metalness |
Base color (web) |
|
||||
|
|
Red |
Green |
Blue |
|
Red |
Green |
Blue |
||||||
|
Silver |
|
252 |
250 |
249 |
|
255 |
255 |
255 |
|
1.082 |
1 |
fefefd |
|
|
Gold |
|
243 |
201 |
104 |
|
255 |
255 |
255 |
|
1.35002 |
1 |
fbe6ab |
|
|
Copper |
|
238 |
158 |
137 |
|
255 |
255 |
255 |
|
1.21901 |
1 |
f8cfc2 |
|
|
Aluminium |
|
230 |
233 |
235 |
|
255 |
255 |
255 |
|
1.002 |
1 |
f5f6f6 |
|
|
Chromium |
|
141 |
141 |
141 |
|
255 |
255 |
255 |
|
1.03 |
1 |
c5c5c5 |
|
|
Lead |
|
167 |
168 |
176 |
|
255 |
255 |
255 |
|
1.016 |
1 |
d4d5d9 |
|
|
Platinum |
|
243 |
238 |
216 |
|
255 |
255 |
255 |
|
1.024 |
1 |
faf8ee |
|
|
Titanium |
|
246 |
239 |
208 |
|
255 |
255 |
255 |
|
1.086 |
1 |
fcf9ea |
|
|
Tungsten |
|
236 |
213 |
193 |
|
255 |
255 |
255 |
|
1.007 |
1 |
f7ece2 |
|
|
Iron |
|
226 |
223 |
210 |
|
255 |
255 |
255 |
|
1.006 |
1 |
f3f1eb |
|
|
Vanadium |
|
241 |
228 |
199 |
|
255 |
255 |
255 |
|
1.034 |
1 |
faf3e5 |
|
|
Zinc |
|
223 |
221 |
218 |
|
255 |
255 |
255 |
|
1.011 |
1 |
f1f0ef |
|
|
Nickel |
|
226 |
219 |
192 |
|
255 |
255 |
255 |
|
1.016 |
1 |
f3efe2 |
|
|
Mercury |
|
199 |
198 |
198 |
|
255 |
255 |
255 |
|
1.013 |
1 |
e5e5e5 |
|
|
Cobalt |
|
174 |
167 |
157 |
|
255 |
255 |
255 |
|
1.031 |
1 |
d8d4cf |
|
For detailed information on the Metalness parameter, go to Chaos Group's blog post.
Examples
Below are some examples and their settings.
Diffuse 255,255,255; Reflection 255,255,255; Glossiness 1; IOR 1.5
Diffuse 0,0,0; Reflection 255,255,255; Glossiness 1; IOR 1.5.
Diffuse 0,0,0; Reflection 255,255,255; Glossiness 1; IOR 2
Diffuse 243,201,104 (gold); Reflection 255,255,255; Glossiness 1; IOR 1.35.
Diffuse 46,46,46 (18% gray); Reflection 255,255,255; Glossiness 0.6; IOR 1.5.