Nvidia GI Hardware Support

Adam Pawlowski · 2014-09-25T23:40:06

I saw the Nvidia moon landing GI demo and the corresponding GI demo on the Nvidia youtube channel. They mention this is coming with their new gpu, is this some hardware supported feature? Does anyone know how it will integrate with other software if that is the case? Also, in the demo with the sphere, they show the voxel data. I'm assuming that the pixel shader performs a raycast into the voxel data to find the closest voxel? I've never messed with voxels before. I'm not sure how that works. Is the data on the gpu a 3d texture and it will just ray cast from the fragments world position + normal until it hits a non blank texel in the 3d texture and then use that information? If so, wouldn't that 3d texture be pretty big? for that small scene it looks like it is about 64x64x64 if it is a 3d texture. Maybe I just don't know enough about voxels. I remember the latest Crysis tech pdf mentioning their GI stuff. Were they doing the same type of thing then?

Graphics and GPU Programming Programming

Started by dpadam450 September 24, 2014 07:45 PM

10 comments, last by Chris_F 9 years, 7 months ago

vlj

1,071

September 25, 2014 03:42 PM

I'm confused. Nvidia supports GL_ARB_sparse_texture with both Kepler and Fermi, so why is this a Maxwell only feature?

GL_ARB_sparse_texture extension only concerns 2D texture.

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Chris_F

3,030

September 25, 2014 11:40 PM

I'm confused. Nvidia supports GL_ARB_sparse_texture with both Kepler and Fermi, so why is this a Maxwell only feature?

GL_ARB_sparse_texture extension only concerns 2D texture.

Read the spec. It supports 2D textures, array textures, cube maps, cube map arrays, 3D textures and rectangular textures.

Nvidia GI Hardware Support

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Nvidia GI Hardware Support

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