Diffuse Alpha Channel to Opacity Channel

Cool , works a treat once more, many thanks dude.
...but I did have to change the last line to mat.opacityMap.monoOutput = 1......again... ;)

@ juumax

full code is....

(
for Obj in objects where isValidNode obj do
(
local mat = obj.material
if superClassOf mat == material AND isproperty mat "diffuseMap" AND classOf mat.diffuseMap == bitMapTexture do
(
mat.opacityMap = copy mat.diffuseMap
mat.opacityMap.monoOutput = 1
)
)
)

changed the last code i posted..
it now checks if the diffuseMap property is present..
currently it uses isproperty .. if that dont work try hasProperty

have phun

Hmm, I just started using this in 2011 and the listener spits out this...

-- Error occurred in obj loop; filename: ; position: 145; line: 5
-- Frame:
-- obj: $shadow test
-- mat: Standard 14:Matte_Shadow
-- called in anonymous codeblock; filename: ; position: 258; line: 10
-- Frame:
-- Unknown property: "diffuseMap" in Standard 14:Matte_Shadow
-- Error occurred in obj loop; filename: ; position: 145; line: 5
-- Frame:
-- obj: $shadow07
-- mat: Standard_11:fR_Matte_Shadow
-- called in anonymous codeblock; filename: ; position: 258; line: 10
-- Frame:
-- Unknown property: "diffuseMap" in Standard_11:fR_Matte_Shadow

seems it doesn't like matte shadow materials in the scene ?
even when I'm running it on a standard material in the number 3 slot with no matte shadow......weird. Maybe when the check finds a matte shadow in the diffuse slot anywhere in the scene it freaks out.

What's your listener saying when you run it ?

Hey I am trying to run this script in max 2010 and I cant seem to get it to work. Do I have to rename my objects in a certain way? I run the script and nothing happens. I have a checker material in the diffuse of a standard material.

I quiet new to maxscript so I dont really understand why, I am trying to do a similar thing as the OP.

yeah borpheus had a spare ;)
(not a typo)

Awesome...I like fail safes, prevention is better than cure ;) Thanks I'll see if I can break it........

code was this ...... (from 1st post)

(
	for Obj in objects do (
		Obj.mat.opacityMap = copy Obj.mat.diffuseMap
		Obj.mat.opacityMap.output.invert = true
	)
)

which was working but for some reason stopped, (or worked sometimes and not others) but I needed it to work on the alpha, so I added this......

Obj.mat.opacityMap.monoOutput = 1

So the final code is....

(
    for Obj in objects where isValidNode obj do
    (
        local mat = obj.material
        if superClassOf mat == material AND classOf mat.diffuseMap == bitMapTexture do
        (
            mat.opacityMap = copy mat.diffuseMap
            mat.opacityMap.monoOutput = 1
        )
    )
)
...which works a treat.......I take it this code runs some checks first ?..., when you post code....i see this.......

gHFGHfghfghfgH&&%&9%^98%^*%^*5^*%^%$&45&4^8%&(5^7%^746*&(%6rtUrTRHJrfJRjRU %^*%76856*58%^8%685^8%6&£$5"FHR^846jFGmJ67(%^urtHR^&8%^*58%*%^8%6*4^&$5&%7 63%$74YRTh^%8&5967)&0^7(5^$%^*&$%8$*4%8$6(%7)6&*0-^8^7(46$£%&37$*5^95&0^)6

if you see strange symbols only .. how come you got the code i posted there? 😉

and yeah it runs some checks first.
-normally you'd check if the object has a material, then if the material has a diffuseMap and then if that mathes the class your trying to work with
-faster way is to check the classes of the values ;) cuz if something is undeFinedClass it aint a bitmapTexture or a material

I was just about to say that......but you beat me to it  ...seriously tho' it feels more refined...you obviously took the red pill 😎

o.0
code pls

if its the small block up top then here it is again with failSafes

(
	for Obj in objects where isValidNode obj do 
	(
		local mat = obj.material
		if superClassOf mat == material AND isproperty mat "diffuseMap" AND classOf mat.diffuseMap == bitMapTexture do
		(
			mat.opacityMap = copy mat.diffuseMap
			mat.opacityMap.output.invert = true
		)
	)
)

Now says -- Unknown property: "material" in undefined :/

replace mat with material

Hmmm... I've come back to using this script in Max 2011 and now I get a

-- Unknown property: "mat" in undefined when I run it, I can't figure it out....can anyone help?

thx

:D sry my fail, dont read your post correctly

That didn't, but it was easy for me to change the last line to this...and it works perfectly :)

Obj.mat.opacityMap.monoOutput = 1

Many thanks, it's a big help...and sort of my first ever script ;)

Don't know if this solves your problem. Copies the diffusemap to opacity channel and set the output-invert to true

(
	for Obj in objects do (
		Obj.mat.opacityMap = copy Obj.mat.diffuseMap
		Obj.mat.opacityMap.output.invert = true
	)
)