Differential D16655 Diff 58189 intern/cycles/kernel/integrator/shade_light.h

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Spectrum light_eval = light_sample_shader_eval(kg, state, emission_sd, &ls, ray_time);		Spectrum light_eval = light_sample_shader_eval(kg, state, emission_sd, &ls, ray_time);
if (is_zero(light_eval)) {		if (is_zero(light_eval)) {
return;		return;
}		}

/* MIS weighting. */		/* MIS weighting. */
float mis_weight = 1.0f;		float mis_weight = 1.0f;
if (!(path_flag & PATH_RAY_MIS_SKIP)) {		if (!(path_flag & PATH_RAY_MIS_SKIP)) {
/* multiple importance sampling, get regular light pdf,		mis_weight = light_sample_mis_weight_forward_lamp(kg, state, path_flag, &ls, ray_P);
* and compute weight with respect to BSDF pdf */
const float mis_ray_pdf = INTEGRATOR_STATE(state, path, mis_ray_pdf);
mis_weight = light_sample_mis_weight_forward(kg, mis_ray_pdf, ls.pdf);
}		}

/* Write to render buffer. */		/* Write to render buffer. */
guiding_record_surface_emission(kg, state, light_eval, mis_weight);		guiding_record_surface_emission(kg, state, light_eval, mis_weight);
film_write_surface_emission(kg, state, light_eval, mis_weight, render_buffer, ls.group);		film_write_surface_emission(kg, state, light_eval, mis_weight, render_buffer, ls.group);
}		}

ccl_device void integrator_shade_light(KernelGlobals kg,		ccl_device void integrator_shade_light(KernelGlobals kg,
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