Problems with RenderTexture

[ImanCol]

I am projecting multiple cameras to select Characters, each Camera projects each Player and their asset has allowed me to round the edge. But it happens that some objects have transparency in their textures. This makes the background visible, so half of the character can be seen half dark.

The problem comes from here:
Blend SrcAlpha OneMinusSrcAlpha, One OneMinusSrcAlpha
This enables the rounding function, but turning it off disables renderTexture.

Is there a way to use the RoundedCorners functionality removing that blend code to avoid the transparency of the objects?