We used a SceneCapture2D component to render a model in order to display it on UI. It was worked perfectly until we packaged it to windows build. The model always used low level mipmap and therefore the model is blurry. We found that disable texture streaming or set texture mip gen setting as NoMipmap can solve the problem. So we thought it must has something to to with texture streaming. And we found a solution to deal with this: put the model closed enough to the main camera and rendering it on the SceneCapture2D. It seems that UE4 will take the model and camera distance into account when streaming texture.
The question is, if a model is not rendering in any camera but just SceneCapture2D, will it used distance between rendering model and camera to compute the mipmap level?
We don’t want to disable texture streaming in our game, or set mip gen setting as NoMipmap, either. Because the spectacular part on model will become blinking if normal texture has no mipmap at all. Also, we want the model displayed in SceneCapture2D is far away enough from main camera. Main camera is rendering a quite different scene so we don’t want to put the model near it.