Hey d yes, i think a swf example would definitely help... the composite material should be able to do what you are attempting, but if not then we can debug as it has almost certainly not been used in this way before!
Rob On Mon, Jul 6, 2009 at 5:55 AM, aleph1 <[email protected]> wrote: > > I am trying to achieve an effect with layered materials that I hope is > possible with away3D. The issue is with having different levels of > specular highlights on each layer of the composite material. The first > layer consists of a PhongBitmapMaterial instance with an fully opaque > image, and its specular value set to 0. The second layer consists of > another PhongBitmapMaterial instance with a semi transparent image > with its specular level > 0. There is a directional light in the scene > as well. > > When I rotate the object the specular highlight of the topmost > material seems to get applied to the layer underneath, even in places > where the topmost bitmap is fully transparent. If I disable the > topmost layer the object renders correctly with no specular highlight. > What I was hoping for is that the specular highlight would only draw > into the semi-transparent and opaque areas of the topmost layer with > transparent areas receiving no specular. This is essential for the > effect I am trying to achieve–the topmost material is gold leaf (quite > shiny) and the bottom material is old leather (not shiny). > > Does the engine support this type of masking of specular highlights? I > haven't looked at the source code for the renderer itself, but it > doesn't seem like it would be too hard to add this. It could be > accomplished using a bitmap that could be applied to each material > layer to specify where the specular should be visible–black = no > specular, grey = scaled specular (greyscale value * specular value), > white = full specular. As I envision it, I don't see it requiring a > huge amount of processing power–it is similar to an effect I used in > another project with bitmaps in Flash–but I could be wrong. If it > isn't supported, and I want to try to tackle it, how do I go about > contributing code? > > If it helps, I can upload a SWF to illustrate what I am trying to > accomplish. > > Thanks for the great engine, and your help! > > d -- Rob Bateman Flash Development & Consultancy [email protected] www.infiniteturtles.co.uk www.away3d.com
