Strange artifacts on my blur shader

Original Post

Nov 20, 2009 at 5:53 PM

When I render a texture with my blur shader, there are artifacts all over the place in a grid-like pattern. The only thing I can think of is that it's pulling it garbage values from somewhere. The blur shader worked fine for other things.

MJP

Nov 20, 2009 at 7:15 PM

I would suggest that you capture a frame with PIX and analyze it. You can...

-Inspect the contents of your render target textures
-Inspect the device state at the time of your Draw call (to make sure your render states and sampler states are what you expect them to be)
-Inspect your draw call and vertex data
-Step through your pixel and vertex shaders line by line

Jason Z

Nov 20, 2009 at 8:48 PM

If you know the shader works, then it must be either the input data or the state of the device when you execute the calls. I agree with Matt - PIX is your friend!

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