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LightWave 3D 8 Lighting Wordware game and graphics library phần 9

Bây giờ chúng ta đã bao phủ một loạt các cách khác nhau của ánh sáng mặt trời hoặc ánh trăng chính, đó là thời gian để ném trong một nguồn ánh sáng thứ cấp, một ánh sáng "lấp đầy" vì nó. Đèn Điền tên vì họ điền vào các không gian nơi mà ánh sáng quan trọng không chiếu sáng. | Chapter 25 Cache Radiosity would be a vastly more useful tool if the cached radiosity solution instead of being held in local memory were held in a file. That way networked machines could access the information the same way networked machines access Particle FX solutions from a single file for particle renders. I m sure if enough of us continue to make noise about this NewTek will see fit to include it in the next great release of LightWave. Faking Soft Shadows No doubt about it sometimes we just can t use radiosity to achieve those beautiful soft shadows we have come to know and love. The truth is it is very difficult to fake that kind of quality but there are many situations in which that level of quality is not necessary because there may be heavy motion blur in the shot or perhaps any soft shadows are not forefront in frame. If you come across a situation where the soft shadows are unimportant enough to fake you should do it. There are literally dozens of way to fake soft shadows. Here are a couple of my favorite tricks. They re easy quick and provide reasonable results without major render power. Using an Area Light OK using an area light isn t exactly what we d call a quick render but it s quicker than radiosity in most cases. The first rule with area lights is to keep them as small as possible. The larger the area light the more render time is required. Second try to reduce Area Light Quality to 3 instead of the default 4. I have never been able to get away with less than 3 for a final render although I have never had to go above 4 either. The maximum quality for area lights is 5. Getting a soft shadow out of an area light is easy. Place it turn up the intensity and render. The larger the area light the softer your shadows will be. 412 Tips Tricks n Tutes Figure 25.118 Figure 25.119 Using Spotlights and Shadow Maps This is a favorite of mine because spotlights with shadow maps render very quickly and because spotlights with shadow-mapped shadows are the only