Hi all,
please can anyone advice me how to transfer color of diffuse map to vertex colors?
Tryed this: http://www.polycount.com/forum/showt...e+vertex+color not working for me.

Is there any script for this? I must use old tech...

Thank you.

if rol_ColorBakerProgress!=undefined do destroyDialog rol_ColorBakerProgress
rollout rol_ColorBakerProgress "Baking Progress" width:190 height:48
(
label lbl_Text "Baking Texture into Vertices:" pos:[20,7] width:150 height:13
progressBar pb1_Progress "ProgressBar" pos:[6,21] width:180 height:20

)
----
----
fn IOI_ColorBakerBakeTexture targetObj=
(
--	targetObj=$
converttoPoly targetObj --NOTE
baseObject=targetObj.baseObject
theBitmap=targetObj.material.diffusemap.bitmap
theBitmapW=theBitmap.width-1
theBitmapH=theBitmap.height-1


vertNum=polyOp.getNumVerts baseObject
fnGetMapvert=polyOp.getMapVert
fnsetVertColor=polyOp.setVertColor
fnsetVertData=polyOp.setVDataValue

createDialog rol_ColorBakerProgress
pbl_Progress=rol_ColorBakerProgress.pb1_Progress
for iVert=1 to vertNum do
(
mapPos=fnGetMapvert baseObject 1 iVert

mapPos[1]=mod (mapPos[1]) 1
mapPos[2]=mod (mapPos[2]) 1
bitmapPos=[(mapPos[1]*theBitmapW) as integer, (mapPos[2]*theBitmapH) as integer]	
if bitmapPos[1]<0 do bitmapPos[1]+=theBitmapW
if bitmapPos[2]<0 do bitmapPos[2]+=theBitmapH
multiW= ceil (bitmapPos[1]/theBitmapW) 
if multiW > 1 do bitmapPos[1]=bitmapPos[1]-theBitmapW*(multiW-1)

multiH= ceil (bitmapPos[2]/theBitmapH) 
if multiH > 1 do bitmapPos[2]=bitmapPos[2]-theBitmapH*(multiH-1)	
bitMapPos[2]=theBitmapH-bitMapPos[2] --theBitmapW-bitMapPos[1], 

mapColor= (getPixels theBitmap bitmapPos 1)[1]
fnsetVertColor baseObject 0 #{iVert} mapColor --PERFORMANCE This is VERY slow. 10sec on 4000 object.

Progress=(iVert/(vertNum as float))*100
if pbl_Progress.value!=Progress do pbl_Progress.value=Progress
)
addModifier targetObj (VertexPaint())
max modify mode
destroyDialog rol_ColorBakerProgress

targetObj.showVertexColors =true
)
IOI_ColorBakerBakeTexture $

CREDIT

There's an 'Assign Vertex Color' tool in the utilities tab that can do that without the need for scripts.

Max will not display vertex colors in the viewport by default. You have to force it, in Object Properties, via Vertex Channel Display. Or you can use a DirectX shader that supports vertex color.

@EricChadwick: yep, I know that standard material > diffuse slot > vertex color map
or
object properties > display vertex colors

@nezach: anyway this script works... max assign vertex colors don't.. so who wins? :P

yeah most of the time i'm not able to assign the vertex color from the diffuse either. Sometimes it weirdly works after checking/unchecking some options but as i'm not considering myself as a max noob, my bet is : it's pretty buggy.

so good news for you Noors this works 100% sure, just second before I decided to script it myself google revealed this to me.. I'm pretty happy cause for time it will be crucial part of my workflow..

TexTools has a button that does it!
http://www.renderhjs.net/textools/

Originally Posted by cupsster

@nezach: anyway this script works... max assign vertex colors don't.. so who wins? :P

You get no diffuse colors to the vertices from using it at all? It works for me so I guess I 'win' at that. /shrug

thanx for pointing that out.. i'm using it but was unaware of this feature..

No, never worked for me except maybe 4 years back when I was experimenting with it..