What is the most efficient way to render a camera view to multiple displays with different material parameters?

Questions & Answers
1

I’m trying to find the best method to render the view taken by a camera to multiple displays via an image-effect material, where the material has different parameters set for each display. I’ve tried to use the following code to blit a texture to a specific display, but it doesn’t work;

public void RenderTextureToDisplay(
    Display display,
    Texture texture,
    Material material)
{
    Graphics.SetRenderTarget(display.colorBuffer, display.depthBuffer);
    Rect screenRect = new Rect(0.0f, 0.0f, display.renderingWidth, display.renderingHeight);
    Graphics.DrawTexture(screenRect, texture, material);
}

The only solution I’ve got to work is to use a Canvas containing a RawImage, where the RawImage is assigned a RenderTexture. The Canvas has its displayTarget set to the display that I want to render to, and the RenderTexture has its dimensions set to the display renderingWidth and renderingHeight. I then use Graphics.Blit to draw my texture/material to the RenderTexture. Although this does work, it seems to be possibly causing a performance issue (I’m guessing because I’m using so many RenderTextures).

2

Can you try to render to one texture and use that texture in many objects?