Hi On Mon, Jul 15, 2019 at 9:40 PM Ismail Sunni <[email protected]> wrote:
> Nice screencast. Are billboards able to handle alpha/opacity channel for >> a given raster? > > > Do you mean the billboard is transparent and we can see the stuff behind > it? > > Well, I am not in that level of understanding of this 3D rendering. But I > can say it's not easy to do something transparent in the 3D world. Since we > need to reconsider how it will be done (without transparency means we just > ignore the covered surface of the 3D objects, while with transparency we > need to know the order of the object). That's what I got from my discussion > with Martin. *Please correct me if I am wrong Martin :) > For billboards that do not rectangular shape (a circle) yes that should be possible and easy to support fully transparent pixels. For semi-transparent images, there will be an issue, rendering output is not going to look good without some special techniques because of how Z buffer works and because objects would need to be always rendered back to front (from camera's view) for alpha blending to be correct. Cheers Martin
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