Getting Irradiance Map calculations from file

4 Apr, 2011 Andrey
4 Apr, 2011 # Re: Getting Irradiance Map calculations from file
Good evening Renderstuff team! First of all I want to say thanks for your excellent lessons and models! they helped me incredibly and help) And the question is this: I calculate the number of angles premises ordinary camera, with Irradiance map, stored in the first angle used in the next. Can I use it when rendering the spherical chamber for the subsequent creation of panoramas? And in some cases it is possible to use the already-calculated map light cache? Thanks in advance for the answer)

4 Apr, 2011 RenderStuff (Staff Author)
4 Apr, 2011 # Re: Getting Irradiance Map calculations from file
Andrei, hello! As was discussed in detail and shown in the tutorial, which describes the principles of the Irradiance the Map , it creates a fully three-dimensional map GI samples. It is also entirely dependent on the point of view of the camera from which it was made a miscalculation. It is unlikely that all the frames of angles that you have to count, first, go from one nodal point (ie the center of the chamber is static and changes only the position of its target), and, secondly, even less likely that all the angles you cover all the 360 degrees. That is, most likely you do not capture and floor and ceiling, and all four sides of the surrounding area around the nodal point of the camera, which will be used to render a virtual panorama 360 . For this reason, there is a high probability that even with all IM all angles that you figured out, yet remain the areas of a scene in which the GI has not figured out n%B8 one of the above angles. That, in turn, will appear as a dark and dirty spots on the panorama 3d render. It may seem that it is possible to use the already-calculated to count only the IM and the panorama for the missing area. However, this is only possible in the case of animation. Official counts IM methods for static frame no. Regarding Light cache , then your question is highly abstract, so that it could give a concrete answer 🙂 In general, you can use wherever you are counted LC, for a particular frame and saved for later use. If you have a question, for what purpose it is necessary to keep LC card, everything is simple. Firstly, it is the most trivial application, when rendering LC is several hours, then another few IM considered, and only after several hours is still rendering the final image. Then we can break rendering on%8Dtapy, if you can not wait for all the stages of rendering immediately. Second, and Third, the purpose of preserving the possibility of LC at the map to your hard drive - a flyby animation rendering, when the whole scene is static and a mobile camera. In this case there is a GI rendering, without rendering the final image. With miscalculation of each new frame of animation, LC card is supplemented with new information on the next block, which is appended to it in the course of GI rendering. After rendering maps Global Illumination is made, the final rendering is done with the help of a common card LC, stored and loaded from the hard disk. It would be impracticable without LC recording capacity on the hard drive😉

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