>> We already adjust the greyness of the sea to reflect the overcast >> value. (It would also be nice if the visible weather in Global matched >> the >> description a bit better: we make the sea grey when it's overcast, but >> the sky is still mostly blue).
> This sounds all really nice and thank you very much for improving this > shaders. But for visible weather we need shadows. Just "dimming > reflection" by some general cloud density makes no sense for me. It seems to me there's a difference between 'we need' and 'would be nice to have'. What, precisely, do we really 'need' shadows for? I'd very much like to have clouds cast real shadows, but: How? Clouds are not 'real' 3d objects in models space, they are rotated stacks of texture sheets. So you can't use any 'real' shadow-generating technique like for a normal object. Real time ray intersection with some ad-hoc light absorbing distribution is out for performance reasons. So we'd somehow have to pre-calculate a shadow distribution (I've worked out the math for that so far), pass it to the shader and project that onto the ground (no idea how to do that in a seamless way), and since it doesn't do to have bright sunny ships with crisp sunlight reflections in a shadowy patch of water, the information needs to go to every single object shader and used there to dim reflections (no idea about the performance footprint of that). As far as I understand, every reflection shader in the scene somehow needs to know if its position is in shadow or not What I really need is a framerate above 20, preferably 30. I'd rather have that without cloud shadows than a framerate of 2-3 with cloud shadows. I don't know about the rest of us... But if you know a fast way of rendering the cloud shadows - please just let me know. Sorry, I'm just getting a bit touchy about reading 'we need' - I've had too much of that recently. Cheers, * Thorsten ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
