题目 --- 请教Studio-Quality Rendering中关于shadow的问题

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586717 斌斌无理 发表于 2008-5-27 18:59:37 楼主
按照书中soft shadow项已经勾选,如何使结果和书中一样,阴影能淡,变虚????

还有就是书中关于物体阴影产生的Float 问题作了理论上的分析,但没有实例讲解,只有实例图的展示,请教具体是怎么实现的呢????

   这是我作出来的效果
   这是书中的效果
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 楼主| 斌斌无理 发表于 2008-5-28 08:55:50
2
J大,按您的指示,sample采样和Jitter抖动都加到了100,还是没什么效果......上传附近请帮忙查看一下问题..........

另外其中这段:

Step 6: Adjust shadows
As you may have noticed, the shadows in the previous step are quite heavy and dominant. We cannot add another light that introduces new shadows. This would destroy the whole setup of this rendering. However, we can add another light somewhat in the same plane as our key light to reduce the length of the key light shadow.
Another reason for adding a light is to keep the shadow underneath the objects darker than the rest of the shadows. If you look carefully at various objects in your room, you will notice that shadows become darker near the objects.
In the images below, you can see that the shadow in the image on the right makes the cube appear to be standing on the surface.
In the next rendering I moved the additional key light to create the highlight on the yellow plug and to change the shape of the shadow to a more natural one.
这里面所谓的 add another light somewhat in the same plane as our key light to reduce the length of the key light shadow  如何操作啊???? 这里所谓的同一平面指的是什么呢????加的spotlight 比原来的key light 照射范围上是不是要加大,角度是不是要加大???  能详细讲一下吗????

Three Plugs Practise.part01.rar (500 KB, 下载次数: 152)
Three Plugs Practise.part02.rar (500 KB, 下载次数: 152)
Three Plugs Practise.part03.rar (500 KB, 下载次数: 146)
Three Plugs Practise.part04.rar (500 KB, 下载次数: 252)
Three Plugs Practise.part05.rar (377.42 KB, 下载次数: 134)
 楼主| 斌斌无理 发表于 2008-5-28 11:26:04
3
嗯....J大说的和我理解的一样,但具体新增加的灯光怎么增加呢??? 教程上的具体说明应该怎么理解???  能举个如何消除厚重阴影的实例吗????
 楼主| 斌斌无理 发表于 2008-5-28 16:10:42
4
J大说的试了,加了相反方向的辅助灯光,阴影是减弱了,但是只起到整体减弱的效果,并没有渐弱的效果了......

唉..............鸟不容易掌握啊,还是偷懒用VRAY的GI吧......................:Q :Q :Q

 楼主| 斌斌无理 发表于 2008-5-28 19:23:54
5
J大,做得太棒了,能上个原文件给我研究一下吗????  

看着教程还是做不出你的效果啊.................

柔和的阴影过渡这盏 KEYLIGHT  放不好啊..............看你的示意图是不是要将spotlight选项值设得很大啊????
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