Why does my Vertex Animation shader produce different results in Scene and Game view?

Questions & Answers
1

Hi!

I’ve been making a game lately, and now I’ve written a simple vertex animation shader which displaces vertices on some vegetation I have, based on some values.

So far, it’s been going OK, but I have some issues when viewing the game side by side with Scene & Game. They produce different results for some reason, and I can’t figure it out. Game and Scene cameras are both set to Isometric.

Here’s how it looks right now:
GIF Link

On the right (Scene) you can see how the vegetation is supposed to look.

Here’s the code bit that is relevant:

// Distance from vertex to model origin.
fixed localDistance = distance(v.vertex.xyz, fixed3(0,0,0));

// Some displacement values.
fixed s = sin(_Time.y * _WindY + v.vertex.x);
fixed c = cos(_Time.y * _WindY + v.vertex.z);

// Add the values to the Y of the vertex.
v.vertex.y += _Shakiness * s * c * localDistance * 0.2;
o.vertex = UnityObjectToClipPos(v.vertex);

(Then we pass the vertex on to the fragment, and so on...)
3

My guess is that your models are being dynamically batched, which will adjust their coordinates as seen by the vertex shader into worldspace in the game view.
Try adding the

"DisableBatching" = "true"

tag to the top of your shader.

2

My guess is a problem with time/framerate and somehow that is different in edit mode. Have you tried fixedTime? How / where are you updating the time info?