diff options
| author | Clément Foucault <foucault.clem@gmail.com> | 2018-11-14 17:46:40 +0300 |
|---|---|---|
| committer | Clément Foucault <foucault.clem@gmail.com> | 2018-11-15 20:16:22 +0300 |
| commit | f3074b96d6fe748900d062c7dc3f51f37f06fc5a (patch) | |
| tree | 2835bd18db47e3720d3143b0c5a658e8a1043f9f /source/blender/draw/engines/eevee/eevee_lights.c | |
| parent | cfb6f14616ecd96831815b48c7edfdd706ddcf2e (diff) | |
Eevee: Make sun power match cycles better.
I made an empirical test with a 100% diffuse sphere and manually tweak the
lighting power of a sun lamp trying to fit cycles and eevee the best I can.
Then I plotted the result and found a rough fit to the equation and that
seems to work pretty well.
Diffstat (limited to 'source/blender/draw/engines/eevee/eevee_lights.c')
| -rw-r--r-- | source/blender/draw/engines/eevee/eevee_lights.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee/eevee_lights.c b/source/blender/draw/engines/eevee/eevee_lights.c index 02667bf7087..962cb7c2033 100644 --- a/source/blender/draw/engines/eevee/eevee_lights.c +++ b/source/blender/draw/engines/eevee/eevee_lights.c @@ -663,6 +663,9 @@ static void eevee_light_setup(Object *ob, EEVEE_Light *evli) else { power = 1.0f / (4.0f * evli->radius * evli->radius * M_PI * M_PI) * /* 1/(r²*Pi) */ 12.5f; /* XXX : Empirical, Fit cycles power */ + /* Make illumation power closer to cycles for bigger radii. Cycles uses a cos^3 term that we cannot reproduce + * so we account for that by scaling the light power. This function is the result of a rough manual fitting. */ + power *= 1.0f + evli->radius * evli->radius * 0.5f; } mul_v3_fl(evli->color, power * la->energy); |