unsupported opaque mode:RGB_ZERO fallback to A_ONE about collada2gltf HOT 5 CLOSED

A lot of models we ran into didn't even use transparency, so in most cases we could just remove the RBG_ZERO opaque mode. As far as I know, the only workaround would be to change the material in the source model to be A_ONE. Gltf materials that are generated don't have the transparent color RGB_ZERO needs, so adding it would mean it would have to be added to a bunch places in the model.

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@tfili do you recall if there is a workaround here?

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So in this case the model makers should intervene? Or can I produce .gltf files by modifying something with the .dae files I have? Or by changing the COLLADA2GLTF conversion files?

I do not know much about 3d modeling. Actually, the subject is: What do I have to say to my 3d team who do 3d .dae files for me? Could you write that right sentence?

Thank you.
@tfili @pjcozzi

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@anilergin did you solved the problem?could you share the method with me? I have encountered same problem with you, the dae file is converted from Bentley dgn file (Modeling tool was Bentley AECOsim building designer, and the model was build several months ago, the workspace of AECOsim has been changed recently ), when I try to convert the dae to gltf by collada2gltf tool, same warning with you :unsupported opaque mode:RGB_ZERO fallback to A_ONE. I wander if there is some workaround to repire the dae file, orelse all the model I built before is useless... thank you all!

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Closing; this isn't relevant in the new converter. Any transparency issues will be handled as part of #168.

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