Irrlicht Engine

Posted: **Wed Jul 14, 2004 12:56 pm**

Okay...

I've got an environment made up of several models. I've found that models with a material type of EMT_TRANSPARENT_ALPHA_CHANNEL don't seem to respond to lights. They have full brightness regardless of the number/size of lights in the environment.

For example if I create a model with the EMT_TRANSPARENT_ALPHA_CHANNEL it's visible without adding any lights. If this material type is not set the model does not show up.

How do I get all of these models to respond correctly to lights.

-Brian

Posted: **Wed Jul 14, 2004 8:36 pm**

I would imagine it is just as anyother texture you need to set the lighting of the matertial to true. like this:

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myNode->setMaterialFlag(irr::video::EMF_LIGHTING, true);

Posted: **Wed Jul 14, 2004 8:39 pm**

That's what I would have thought as well. I've tried this and it has no effect.

-Brian

Posted: **Wed Jul 14, 2004 8:50 pm**

I checked the API and I guess niko is not finish with the EMT_TRANSPARENT_ALPHA_CHANNEL material type because it state:

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EMT_TRANSPARENT_ALPHA_CHANNEL 	Makes the material transparent based on the texture alpha channel. Only first texture is used. Please note that this material is currenly NOT IMPLEMENTED.

I would assume that means you can not expect anything from the material type though maybe he has not undated the documention on this issue.

Posted: **Thu Jul 15, 2004 8:01 am**

There seem to still be a number of issues about the EMT_TRANSPARENT_ALPHA_CHANNEL material. I found that I couldn't use other types of material at the same time without modifying the engine - see the thread here: http://irrlicht.sourceforge.net/phpBB2/ ... php?t=3130

I'd imagine that there could be other such bugs... perhaps there's another change needed in the same place as the above.

Irrlicht Engine

Transparent Materials and Lighting

Transparent Materials and Lighting