How to make .PNG with rgba color model

Author

Message

Impulse

21

Years of Service

User Offline

Joined: 31st Mar 2003

Location:

Posted: 4th Dec 2003 04:48

Link

Does anyone know how to make .PNG files that actually save the alpha channel in either Corel Photopaint or Adobe Photoshop? Any help would be appreciated.

Back to top

Profile PM

indi

21

Years of Service

User Offline

Joined: 26th Aug 2002

Location: Earth, Brisbane, Australia

Posted: 4th Dec 2003 09:34

Link

open photoshop

make a new file with a transparent background

make the graphic

save the file as a psd firstly with layers

save out a png of the same file with none / none in the output settings.

dont save the current file open when u close it so you dont wreck your psd

make a DBA file call it whatever and a project file

add this code if using pro

+ Code Snippet

sync on
sync rate 60


load image "png_test.png",1


disable escapekey
while escapekey()=0

sprite 1,mousex(),mousey(),1

sync
endwhile
delete image 1
delete sprite 1
end

that png wont work with an alpha channel in classic u need to make jet black area of rgb (0,0,0) for the space u want it to be transparent and probably switch to a bmp.

Back to top

Profile PM Email

Impulse

21

Years of Service

User Offline

Joined: 31st Mar 2003

Location:

Posted: 5th Dec 2003 02:39

Link

Thanks a lot.

Is there a way to save an alpha channel that I would have made using the channels docker?

Back to top

Profile PM

Impulse

21

Years of Service

User Offline

Joined: 31st Mar 2003

Location:

Posted: 5th Dec 2003 02:49

Link

Is it possible to texture an object with this file?

Back to top

Profile PM

indi

21

Years of Service

User Offline

Joined: 26th Aug 2002

Location: Earth, Brisbane, Australia

Posted: 5th Dec 2003 03:41

Link

yes and yes. the best results I have found for alpha channel work is to save it out as a DDS file. Nvidia has a DDS importer exporter for photoshop on their site in the developer section.

Always save the PSD file for tweaking later as the DDS export cant be re- edited as easily since it exports the image in a consecutive series of smaller images for use in mip mapping provided that feature is activated in the export window settings.

Apparantly when exporting DBP only likes 1 bit alphas.

Back to top

Profile PM Email

Impulse

21

Years of Service

User Offline

Joined: 31st Mar 2003

Location:

Posted: 5th Dec 2003 23:07

Link

Thanks a lot.

Back to top

Profile PM

Impulse

21

Years of Service

User Offline

Joined: 31st Mar 2003

Location:

Posted: 5th Dec 2003 23:26

Link

Wait a minute, this is what I have:

+ Code Snippet

load object "C:\3dsmax4\Scenes\mech\tex\ship.x", 1
load image "C:\3dsmax4\scenes\mech\tex\cross.dds", 1
texture object 1,1
do
sprite 1, mousex(), mousey(), 1
loop

The .DDS file works because I can see the alphablending with the sprite, but the .x file just appears white. The .x file does have mapping information.

Back to top

Profile PM

indi

21

Years of Service

User Offline

Joined: 26th Aug 2002

Location: Earth, Brisbane, Australia

Posted: 6th Dec 2003 06:27

Link

look for the command "set object" and the pro versions that relate to the "transparency flag".

run this example if you have pro

rem ---------------------------------------------------------------
rem TRANSPARENCY BY INDI FOR dbpro
rem
rem ----------------------------------------------------------------

rem Set Up
sync on : sync rate 60
color backdrop rgb (192,192,192)

rem make a temp  internal image with black in it
ink rgb(255,0,0),1
box 0,0,32,32
   ink rgb(255,255,0),1
   box 4,4,28,28
      ink rgb(0,0,0),1
      box 8,8,24,24
get image 1,0,0,32,32
cls

rem make a cube
make object cube 1,1
position object 1,0,0,0
texture object 1,1

REM --------------------------------------------------
REM THESE ARE DBPRO COMMANDS OTHERWISE LOOK FOR THE
REM COMMAND SET OBJECT IF USING CLASSIC
set object cull 1, 0
set object filter 1, 0
set object transparency 1, 1
REM --------------------------------------------------

rem update the camera
position camera 0,0,-3
point camera 0,0,0

rem temp main loop
   disable escapekey
   while escapekey()=0

r = wrapvalue(r)+1

rotate object 1,r,r,r

sync
   endwhile

rem cleanup
delete object 1
delete image 1
end

+ Code Snippet

rem ---------------------------------------------------------------
rem TRANSPARENCY BY INDI FOR dbpro
rem
rem ----------------------------------------------------------------

rem Set Up
sync on : sync rate 60
color backdrop rgb (192,192,192)

rem make a temp  internal image with black in it
ink rgb(255,0,0),1
box 0,0,32,32
   ink rgb(255,255,0),1
   box 4,4,28,28
      ink rgb(0,0,0),1
      box 8,8,24,24
get image 1,0,0,32,32
cls


rem make a cube
make object cube 1,1
position object 1,0,0,0
texture object 1,1


REM --------------------------------------------------
REM THESE ARE DBPRO COMMANDS OTHERWISE LOOK FOR THE
REM COMMAND SET OBJECT IF USING CLASSIC
set object cull 1, 0
set object filter 1, 0
set object transparency 1, 1
REM --------------------------------------------------

rem update the camera
position camera 0,0,-3
point camera 0,0,0


rem temp main loop
   disable escapekey
   while escapekey()=0

      r = wrapvalue(r)+1

      rotate object 1,r,r,r

   sync
   endwhile

rem cleanup
delete object 1
delete image 1
end

and run this if you have classic

+ Code Snippet

rem ---------------------------------------------------------------
rem TRANSPARENCY BY INDI FOR DBC
rem
rem ----------------------------------------------------------------

rem Set Up
sync on : sync rate 60
color backdrop rgb(192,192,192)

rem make a temp  internal image with black in it
ink rgb(255,0,0),1
box 0,0,32,32
   ink rgb(255,255,0),1
   box 4,4,28,28
      ink rgb(0,0,0),1
      box 8,8,24,24
get image 1,0,0,32,32
cls


rem make a cube
make object cube 1,1
position object 1,0,0,0
texture object 1,1

set object 1,1,0,0,1,1,1

rem update the camera
position camera 0,0,-3
point camera 0,0,0


rem temp main loop
   disable escapekey
   while escapekey()=0

      r = wrapvalue(r)+1

      rotate object 1,r,r,r

   sync
   endwhile

rem cleanup
delete object 1
delete image 1
end

Back to top

Profile PM Email

Impulse

21

Years of Service

User Offline

Joined: 31st Mar 2003

Location:

Posted: 8th Dec 2003 03:01

Link

Is alphablending possible on 3-D objects?

Back to top

Profile PM

indi

21

Years of Service

User Offline

Joined: 26th Aug 2002

Location: Earth, Brisbane, Australia

Posted: 8th Dec 2003 15:08 Edited at: 8th Dec 2003 15:10

Link

I dont know what means as a term but ive probably seen it or used it and not realised that was its name. Can you elaborate what you mean.
Do you mean like semi transparent areas like a frosty window or a cloud of gas? then yes its possible in DBP as I had an issue with that happening to my ripped flag and the dirt was sort of see through in the place i wanted a rip or clear spot of alpha work.

Back to top

Profile PM Email

Impulse

21

Years of Service

User Offline

Joined: 31st Mar 2003

Location:

Posted: 28th Dec 2003 23:14

Link

Exactly, semi-transparent objects where you can control exactly how much transparency you have on each area. About your issue, did you disable mipmapping on your flag's texture?

Back to top

Profile PM

Sorry your browser is not supported!

2D All the way! / How to make .PNG with rgba color model