[fixed]EMT_TRANSPARENT_ALPHA_CHANNEL bug ?

[terefang]

hi!

i use some custom models (nwmax) with alpha-textures.

if i set EMT_TRANSPARENT_ALPHA_CHANNEL the model looks (bad) like:





if i set EMT_TRANSPARENT_ALPHA_CHANNEL_REF the model looks (ok) like:




the used textures are all

Format: TGA (Truevision Targa i
Geometry: 512x512
Class: DirectClass
Colorspace: RGB
Type: TrueColorMatte
Depth: 8 bits
Channel depth:
Red: 8-bits
Green: 8-bits
Blue: 8-bits
Opacity: 8-bits
Channel statistics:
Red:
Min: 0
Max: 123
Mean: 46.1269
Standard deviation: 13.7274
Green:
Min: 0
Max: 134
Mean: 54.4052
Standard deviation: 13.8006
Blue:
Min: 0
Max: 82
Mean: 30.8418
Standard deviation: 11.8168
Opacity:
Min: 0
Max: 255
Mean: 102.075
Standard deviation: 124.03

i can post the mesh creation code if needed.

cheers,
[/code]

[niko]

Yep, it's a bug. Going to fix it in the next release. I think some people already posted fixes for this in this forum.

[terefang]

the fix you're refering to is for
OpenGL with EMT_TRANSPARENT_ALPHA_CHANNEL_REF

but my bug-report is for dx8+9+opengl with the
EMT_TRANSPARENT_ALPHA_CHANNEL option set
on the material.

i already recompiled the material renderer with zbuffer enabled, but
this causes (parts) of other alpha-textures to disappear as seen here:



OR is this probably the (correct) fix and the above is simply a limitation
of the engines animated mesh implementation ?

the entire model(s) you see in the snapshot are actually only "one"
scenenode ...

[fcoutant]

I have found a solution for this.
Look at this post: http://irrlicht.sourceforge.net/phpBB2/ ... php?t=7545
May not be perfect, since I only did it for OpenGL, but you may be able to translate the idea easily to DX8/9.

[bosko]

maybe this will help
here's the code to add to your scene manager:

Code: Select all

pSceneMgr->getParameters()->setAttribute(scene::ALLOW_ZWRITE_ON_TRANSPARENT, true);

And to your scene node's material:

Code: Select all

Material.setFlag(video::EMF_ZWRITE_ENABLE, true);

from link: http://irrlicht.sourceforge.net/forum/v ... hp?t=39210

[CuteAlien]

You just dug up a nearly 8 year old thread ... :-)