Transparent Diffuse on Render Texture not working.

Hi all,

I have some quads in my scene that have the legacy Transparent / Diffuse shader on them.

I'm then rendering these to a render texture, to be displayed on screen.

The issue being - none of the quads are actually rendered into the render texture. If I change the shader to be any of the sprite shaders, they work fine.

However, it's quite important that these do not behave like sprites & have a diffuse material instead. I've played around with a number of blend settings on the shader (downloaded and edited from the Unity downloads page). I've had marginal amounts of success, but really.. I have no idea with shaders!

If anyone could point me in the right direction / let me know what blend settings to use, I would be incredibly grateful!

Thanks in advance,
Matt