Gamasutra - Blogs http://www.gamasutra.com/blogs/ David Rosen's Blogs Fri, 10 Feb 2012 07:36:12 EST en-us scarless@think-services.com (Simon Carless) Imposters - by David Rosen http://www.gamasutra.com/blogs/DavidRosen/20101004/6126/Imposters.php Programming Performance gains can be achieved by using texture atlases and instancing, but it won't be enough for dense environments like forests and jungles. For these, imposters are needed! http://www.gamasutra.com/blogs/DavidRosen/20101004/6126/Imposters.php Mon, 04 Oct 2010 03:17:00 EDT Image-Based Ambient Lighting - by David Rosen http://www.gamasutra.com/blogs/DavidRosen/20100420/4973/ImageBased_Ambient_Lighting.php Programming While ambient lighting has historically been represented by a uniform grey light that fills the entire scene, image-based ambient lighting provides a more intuitive and more efficient way to achieve higher quality results. http://www.gamasutra.com/blogs/DavidRosen/20100420/4973/ImageBased_Ambient_Lighting.php Tue, 20 Apr 2010 05:29:00 EDT Using Texture Atlases - by David Rosen http://www.gamasutra.com/blogs/DavidRosen/20100326/4777/Using_Texture_Atlases.php Programming So a texture is an image that is wrapped around a 3D model to add apparent detail -- but what's a texture atlas? http://www.gamasutra.com/blogs/DavidRosen/20100326/4777/Using_Texture_Atlases.php Fri, 26 Mar 2010 09:30:00 EDT Two-Part Shadow Maps - by David Rosen http://www.gamasutra.com/blogs/DavidRosen/20100317/4691/TwoPart_Shadow_Maps.php Programming The shadow maps we use in Overgrowth are unusual in that they contain two parts: direct shadows and ambient occlusion. These correspond to the two light sources in outdoor scenes, the sun and the sky. http://www.gamasutra.com/blogs/DavidRosen/20100317/4691/TwoPart_Shadow_Maps.php Wed, 17 Mar 2010 05:56:00 EDT Gamma-Correct Lighting - by David Rosen http://www.gamasutra.com/blogs/DavidRosen/20100204/4322/GammaCorrect_Lighting.php Programming The lighting equations used for computer graphics are all based on physics, and thus assume that brightness 1.0 emits twice as many photons as brightness 0.5. However, on a computer screen, this assumption is not perceptually correct. http://www.gamasutra.com/blogs/DavidRosen/20100204/4322/GammaCorrect_Lighting.php Thu, 04 Feb 2010 11:52:00 EST Organic Indie Preorder Pack Postmortem - by David Rosen http://www.gamasutra.com/blogs/DavidRosen/20100128/4258/Organic_Indie_Preorder_Pack_Postmortem.php Production A full debrief on the success of the preorder bundle for Overgrowth and Natural Selection 2. http://www.gamasutra.com/blogs/DavidRosen/20100128/4258/Organic_Indie_Preorder_Pack_Postmortem.php Thu, 28 Jan 2010 03:49:00 EST