My Draw Calls go from 30 to 125 and I have twice as much tris/verts when I enable a spotlight. Why??

Question

Hey there!

I am making a mobile game, and the player has a Flashlight (Spotlight w/ cookie).

When I disable this light (there are no other light exept ambient light) I get 30 drawcalls and 50 FPS on my phone, which is really good.

But when I have it enablen - and that's in most of the time - then I have 125 Drawcalls and 30 FPS, which is okay, but on older devices it will be only about 15, which is really bad.

Any workaround for that??

(Sorry for my english)

Profiler:

LIGHT DISABLED: off

LIGHT ENABLED: on...

Answer 1

Answer by Twelv445 · Aug 17, 2015 at 09:25 PM

Are you using Forward or Deferred rendering? In forward rendering objects need to be drawn multiple times for each light they are affected by. Try changing to deferred rendering this should increase your performance.

Add comment · Show 5 · Share

N00MKRAD · Aug 17, 2015 at 10:41 PM 0

Share

thanks for the answer!

I'm using Forward, I'll try deferred!

Twelv445 · Aug 17, 2015 at 10:58 PM 0

Share

No problems! Let me know if it works for you, otherwise also as mentioned above - take note of shaders used. $$anonymous$$ake sure you're using the mobile shaders and if all else fails go for unlit shaders :)

N00MKRAD · Aug 17, 2015 at 11:18 PM 0

Share

I can't use $$anonymous$$obile/Diffuse shader because it's not affected by spot lights.

Winterblood · Aug 17, 2015 at 11:44 PM 0

Share

That's because lighting is expensive and mobile platforms struggle with it. If you use the more expensive shaders, you'll have to take a corresponding drop in performance.

N00MKRAD · Aug 18, 2015 at 11:54 AM 0

Share

Changing the Render mode to Deferred only increased the performance by 2 or 3 FPS...

My Draw Calls go from 30 to 125 and I have twice as much tris/verts when I enable a spotlight. Why??

1 Reply

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions