radioVOY Posted January 21, 2004 Share Posted January 21, 2004 im working on a vrwl models exported from viz but i have problems with the opacity of the trees. i've tried with jpeg's, tiff and targa but i can't get opacity's. someone can share a link or tip. Link to comment Share on other sites More sharing options...
Richard McCarthy Posted June 20, 2004 Share Posted June 20, 2004 What do you mean opacity? what exactly do you want to do? Link to comment Share on other sites More sharing options...
Ernest Burden III Posted June 20, 2004 Share Posted June 20, 2004 What do you mean opacity? what exactly do you want to do? He is refering to alpha channels. He wants to use tree textures with alphas or 'transparent color'. I don't know if VRML 1 or 2 supports that. Link to comment Share on other sites More sharing options...
quizzy Posted June 20, 2004 Share Posted June 20, 2004 I does not support alpha channels.... Link to comment Share on other sites More sharing options...
Ernest Burden III Posted June 20, 2004 Share Posted June 20, 2004 I does not support alpha channels.... But does it support a 'transparency' color, often color 0 (black)? Link to comment Share on other sites More sharing options...
quizzy Posted June 20, 2004 Share Posted June 20, 2004 don't think so.. Link to comment Share on other sites More sharing options...
Richard McCarthy Posted June 21, 2004 Share Posted June 21, 2004 He is refering to alpha channels. He wants to use tree textures with alphas or 'transparent color'. I don't know if VRML 1 or 2 supports that. I know what he mean by opacity, but I was just wasn't sure what he wants to do ... because opacity can be achieve by many means in VRML. eg. The material opacity on object can be selected per face or per object basis and make however "transparent" you want. OR , if he wants to do alpha-channeling textures, then VRML supports both GIF transparency (1 bit, ugly pixel edge with no anti-aliasing) AND the PNG FULL 8 bit alpha channel transparency (that's 256 level of shade of alpha or "feathering") A tip : use PNG transparency. I have tested it extensively and it seems it works FASTER (surprisingly) then GIF transparency. In one experiment I put millions of those textures to gauge the difference performance and that's just my finding. It also gives the nicest result. Mind you, I mostly use Cosmo player for my VRML stuff, so I am not sure how Cortona or Blaxxun would have similar performance gain. To be honest, I think the difference is really negilible if you have just one or two alpha channel texture used in the scene. Link to comment Share on other sites More sharing options...
Richard McCarthy Posted June 21, 2004 Share Posted June 21, 2004 don't think so.. Yes You can Link to comment Share on other sites More sharing options...
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