One mesh , one material , no textures ,but multiple draw calls

Question

hello guys . i am working on an endless runner project , and in my project i am using object pooling , in a way that most of my environment is pooled and spawned together. so i have recently decided to reduce my draw calls (Set pass calls ). at first i had multiple fbx files , so i decided to move all my files to just one fbx . i am using houdini as modeling software , and in houdini alt text

i 've added each of my geometries as a file node in houdini then i exported the resulting geometry as an output FBX.

and houdini turns this for me to only ONE geometry. when i export this geometry and bring it to unity , and i should mention , i am just using the unity default material , and no textures . when i hit play there is 5 draw calls . alt text i know why there are 5 draw calls , because i have 5 geometries combined into one single geometry, but isn't unity suppose to use only one draw call per mesh ? here is my question , why there is 5 draw calls for only one mesh ? and i 've read one answer that in forward rendering there is one draw call for each gameobject , and my camera's rendering is forward . and if problem is in houdini side , i would appreciate if you tell me how to fix it . thanks a lot.

Answer 1

Best Answer

Answer by SunnyChow · Sep 03, 2018 at 07:55 AM

Try placing a cube into the scene instead of your model, it may get the same drawcall. I feel unity need other drawcall for the shadow or background

Add comment · Show 2 · Share

navidhaghighi · Sep 03, 2018 at 01:35 PM 0

Share

@SunnyChow yes , you're right , i have placed a simple cube , and it is still 5 draw calls , i have a feeling that there shouldn't be 5 draw calls for just one cube because i have seen many articles that people drop their drawcalls to 1 , do you know how can i drop it to 1 drawcall without getting rid of shadows and all that stuff?

SunnyChow navidhaghighi · Sep 04, 2018 at 02:27 AM 1

Share

I don't know. I don't even know if it's possible.

Answer 2

Answer by angrypenguin · Sep 03, 2018 at 06:37 AM

Is your mesh internally sill composed of 5 sub-meshes? If you click the arrow next to your model in the Project view what's in there?

Add comment · Show 1 · Share

navidhaghighi · Sep 03, 2018 at 06:52 AM 0

Share

@angrypenguin , in unity it is not , it is just one model that has one mesh , and inside houdini , it is a single piece of geometry . here is a picture : https://drive.google.com/open?id=1WixGgcm8$$anonymous$$sjBfc6lqyAGsnY1qhjZDO3B

One mesh , one material , no textures ,but multiple draw calls

2 Replies

Your answer

Follow this Question

Related Questions