Hi all,

Hope someone can help me with this one! Because of performance, i want to render a reflection map/texture without antialiasing while rendering the whole scene (which draws a plane with the reflectiontexture) to the screen with antialiasing.

My application, that includes a reflection plane, worked fine without antialiasing. Than I added this code to turn on antialiasing:

But now i get message: "The active render target and depth stencil surface must have the same pixel size and multisampling type".

This is how my reflextion target is declaired:

When i change it to reflectiontarget to multisampling like this:

my application runs to slow!

Than i tried to draw the reflectiontarget whithout multisampling like this in the draw method:

But now I end up with 2 FPS :-(

What is an efficient way to draw a reflection low quality (without multisampling antialiasing) and than draw everything to the screen(with multisampling antialisating)?

Your original error meant exactly what it said: "the active render target and depth stencil surface must have the same pixel size and multisampling type". If you set a rendertarget with a different multisampling type to the main backbuffer, you must also set a depth stencil surface that matches that same multisampling type.

Create a rendertarget without multisampling.

Create a matching depth buffer without multisampling.

Make sure you always use the correct depth buffer to go with whatever format rendertarget is currently set.

The "antialiasing" or "multisampling" parameters of the device are only used for creating the initial render target and depth buffer.

Thanks for the help! I managed to do the trick. For other forum users, here is my code. I create a custom depthbuffer:

before drawing to the custom rendertarget(for the texture) i use my custom depthbuffer:

Then i draw some stuff to the rendertarget and afterwards i tell the graphicsdevice switch back to the standard rendertarget and depthbuffer again.