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I made some tests with materials in Cinema, as I needed to have some references for the work with the materials. Started with plastics.

All the spheres have the some reflectance colour (137/137/137).

The specular colour changes from left to right (40/40/40 - 120/120/120 - 200/200/200) and the roughness changes from front to back (0/0 - 0.4/0.4 - 0.8/0.8 ) as it is stated in the picture.



Second plastic things are rendering. Now with changing reflectance colour and specular colour.

the next one:

this time all spheres have the roughness of u=v=0.

To the right reflectance colour gets brighter, to the back the specular colour is changing to blue.

Thanks macray

very usefull

thX!

Thank you for compiling those tests. Very understandable and will be use.

Great work Macray!

I added your work to the tips/techniques section!

here are some more:



I used a 24 bit floor texture for the colour channel. For the relief channel there is a 24bit, but 8 colour black and white earth, but even though it is set to 800% there seems to be something wrong. The right 3 spheres have a texture with colour+relief channel. Same textures as before.
The plastic spheres in the background have a reflectance colour of (231/0/0) but aas you can see the colour map is overriding it.

results:
- metal uses the relief (bump) map. The colour map is ignored. Might need more testing
- diffuse takes what it is given
- plastics seem to ignore the bump map as well
- all bumps look strange

next one: This time it's blue spheres with different attenuation. The materials can be found in your material database that ships with maxwelll.
The spheres have a diameter of 10cm.




If you've seen that picture before and downloaded it - please be sure to use this version - the other one had a wrong description!

These 2 pictures show materials from the "basic vol. i" material database.
Should cook the glass a bit longer, but wanted the renders to have rendered appr. the same time 40-60 minutes.

before you ask: All pictures are original size rendered on a Dell Laptop 1.7Ghz PentiumM.

thanks for posting all these useful tests !

concerning the bump map i have also noticed some unpredictable results. have you posted this somewhere in the bugs section ?

cheers
michael

No. feel free to do it. just wanted to have a pic of every material and then go more into the details. Like how to setup textures, bumps, alpha.... whatever I can think of. (If I have time to do...)

Thanks for the good works. And, it's easy to understand the relationships, especially your first and second posts.

next come the frosted materials. Time to render over the night till tomorrow morning.

Here are the last metals and fashion plastics. Some very ugly rings - but maybe that's the fashion on these plastics.

here are the missing material tests, for those who might still need them.