Есть предложение открыть форум или тему "КАК СДЕЛАТЬ ЭТО...", допустим для fRender, где профи и все желающие поделяться знанием как сделать КОНКРЕТНЫЕ материалы для КОНКРЕТНЫХ ситуаций... уроки по максу это хорошо, но там слишком много общего и ничего конкретного, наверно многих заинтересует... это я после прочтения того как все просили одного и того же - стекла, а ведь есть еще масса "прелестей", ктому же и стекло бывает разным......
Открываю мануал (почему это должен делать я? 
и смотрю по оглавлению:
Ref.level (стр. 140) - Sets the amount of reflection a surface has. Higher numbers will make the object behave like a perfect mirror.
Important
fmalRender behaves like 3ds max when mixing colors or calculating reflections. To cre- ate a surface that behaves like a 100% perfect mirror, you must paradoxically set the reflection level to 50% and the filter color to white (RGB = 255,255,255). With this setting you can control the reflection amount by changing the filter color to a black color or a white color. Reflection Levels below 50% or above 50% will "feed in" the diffuse color amount of the material.
Or in other words, fmalRender defines a reflection as a component of the Filter Color, the Diffuse Color and the Reflection Level. The Filter Color and Diffuse Color is balanced by the Reflection Level.
RH-Rays(стр 119) - Random Hemispheric Rays (RH-Rays) are an essential part of Global Illumination rendering. The amount of RH-Rays used has a direct relationship to the quality of the final image. Using more rays will create smoother and better images, assuming that the sample distribution in the scene is good enough. More rays are needed in scenes that have less or no direct light, e.g. self illuminated materials serving as a replacement for area lights.
RH-Rays are created in a hemispheric dome like manner from each sample point. Every single RH-Ray that hits another surface will create another Random Hemispheric dome of rays and so on. This kind of avalanche of rays will only
stop when the maximum diffuse bounce level is reached. The bounce level can be
adjusted in the raytracer controls.
Min.Density(стр 120) - Defines the minimum density to be used when placing sample points in space. Each sample point will be within this distance of each other.
TIP
The distance you are able to set with Min. Density is calculated relative to the scene boundary. A really big scene will need bigger Min. Density values. Be careful with these settings, if say you removed an object that was 100,000 units away, die scene would suddenly be only 500 units wide, if you kept the original Min. Density you would face problems, as the density has now increased by a factor of 200!
ну а дальше сам...
PS видишь как все просто и в форум не стоило писать...
и смотрю по оглавлению:Ref.level (стр. 140) - Sets the amount of reflection a surface has. Higher numbers will make the object behave like a perfect mirror.
Important
fmalRender behaves like 3ds max when mixing colors or calculating reflections. To cre- ate a surface that behaves like a 100% perfect mirror, you must paradoxically set the reflection level to 50% and the filter color to white (RGB = 255,255,255). With this setting you can control the reflection amount by changing the filter color to a black color or a white color. Reflection Levels below 50% or above 50% will "feed in" the diffuse color amount of the material.
Or in other words, fmalRender defines a reflection as a component of the Filter Color, the Diffuse Color and the Reflection Level. The Filter Color and Diffuse Color is balanced by the Reflection Level.
RH-Rays(стр 119) - Random Hemispheric Rays (RH-Rays) are an essential part of Global Illumination rendering. The amount of RH-Rays used has a direct relationship to the quality of the final image. Using more rays will create smoother and better images, assuming that the sample distribution in the scene is good enough. More rays are needed in scenes that have less or no direct light, e.g. self illuminated materials serving as a replacement for area lights.
RH-Rays are created in a hemispheric dome like manner from each sample point. Every single RH-Ray that hits another surface will create another Random Hemispheric dome of rays and so on. This kind of avalanche of rays will only
stop when the maximum diffuse bounce level is reached. The bounce level can be
adjusted in the raytracer controls.
Min.Density(стр 120) - Defines the minimum density to be used when placing sample points in space. Each sample point will be within this distance of each other.
TIP
The distance you are able to set with Min. Density is calculated relative to the scene boundary. A really big scene will need bigger Min. Density values. Be careful with these settings, if say you removed an object that was 100,000 units away, die scene would suddenly be only 500 units wide, if you kept the original Min. Density you would face problems, as the density has now increased by a factor of 200!
ну а дальше сам...
PS видишь как все просто и в форум не стоило писать...