>>100177474
Indeed the culling is done per tile so that when it comes to fragment shader, the fragment looks at the array of lights corresponding the tile it belongs to.
This is what a fragment shader in this context looks like:
// Get the index of the current pixel in the light grid.
uint2 tileIndex = uint2( floor(IN.position.xy / BLOCK_SIZE) );
// Get the start position and offset of the light in the light index list.
uint startOffset = LightGrid[tileIndex].x;
uint lightCount = LightGrid[tileIndex].y;
LightingResult lit = (LightingResult)0; // DoLighting( Lights, mat, eyePos, P, N );
for ( uint i = 0; i < lightCount; i++ )
{
uint lightIndex = LightIndexList[startOffset + i];
Light light = Lights[lightIndex];
LightingResult result = (LightingResult)0;
...
}
(taken from https://www.3dgep.com/forward-plus/)
