specular and alpha problem (max8)

rollin

small wired problem

ok lets say i have a max shader (standart)
diffuse is only grey
some normalbump
i have a spec map with lets say a checker pattern

and i have an opacity-map with a greyscale alphamap

the wired thing is .. i can see (only if i render it) the specular even in parts where the diffuse is not visible bc of the alpha map

is this a common problem ?! and does anyone know a solution ?

Rick Stirling

yes. Grumble grumble.

turn you spec map into a mask rather than bitmap

put the spec map in one slot, and the diffuse alpha in te other

you can reuse the diffuse texture, just use the alpha component

rollin

thx.. this get rid of this stupid spec.. but there is still some very tiny edge visible.. ?!? but i think i can get rid of it by using an desaturated object-id renderer as alpha mask in photoshop *cracycracy*

btw.. checkt the alpha map 1000 times.. it´s loaded correct and yes its the map i make changes on black is black and white is white and i tried rgb-tga and grayscale-tga.. maybe i should try a tif.. uhaaa *death*

rooster

hi man trying to recreate your situation, when I do it all with seperate maps renders fine so is it an alpha channel thing mebes?

grey diffuse material,
normalbump in bump
spec map - tga? has alpha channel?
opacity map - is this in an image alpha channel?
edit: pix would be handy

rollin

jap afer work i will try again to fix the problem..then i will post some pics.. thx for the time you take to try !!!!

rollin

ok i made a new max-material and also masked the normalbump now it seems to work

edit: the mask-map seems to reduce the masked-map-map-sice about the half or so.... why??