Can't Reduce Draw Calls / Combine Meshes

Questions & Answers
1

Hi,
I Made a car model in Blender consisting of 6 Parts body, roof and 4 wheels.
I wanted this to be only one mesh and use one material (I was going to make a flat shading style game), so i joined the objects in blender and uv mapped it to a color atlas.

41184-uvmapissue.jpg
41184-uvmapissue.jpg1315×507 46.9 KB

But now when i import it into unity i got 4 draw calls for a single car. So i looked at the material the car is using and found it is using the same material 3 times…

41186-materials.jpg
41186-materials.jpg1729×686 114 KB

when i reduce it to 1 material only part of the mesh is shown.

alt text

How do i get to combine those meshes correctly so i get only 1 draw call?
That is rather important, because i wanna publish to android.
Thanks in Advance,
FlomoN

2

You need to go back to blender and check your materials there. From what I can see it looks like your applying 3 different instances of the same material to different parts of your model.

I don’t use blender so I can’t advice you more than that sorry!

3

The Solution is to close the image in the UV Editor, Re-Open it and then Unwrap the whole model again. That way you’ll only get one Material and one Draw-Call in Unity.