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Question

If I do the following:

RenderTexture newTex = new RenderTexture(256, 256, 0);
Material newMat = new Material(Shader.Find("Diffuse"));
newMat.SetTexture("_MainTex", newTex);

I get

Error assigning 2D rectangle texture to 2D texture property '_MainTex': Dimensions must match

It doesn't matter what dimensions I specify, not to mention that the Material should have no dimensions until I give it a texture. What exactly is it that doesn't "match"?

Even weirder: The code runs fine if I ignore the error (so it's more like a warning)... But I despise leaving warnings in my code.

Answer 1

0

The voodoo solution is this:

For some reason, you must tell Unity whether this is a power of two texture or not. The following sequence of lines prevents the error.

    RenderTexture newTex = new RenderTexture(1024, 1024, 0);
    newTex.isPowerOfTwo = true;         // This line prevents the error
    newTex.Create();                    // This line is totally optional

answered Feb 03 '10 at 03:05 PM

Kevin Laity
214 ● 13 ● 13 ● 25

Thanks! This totally solved my bizarro bug.

Jun 30 '10 at 04:23 PM rogerimp

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Answer 2

0

I believe that instantiating a RenderTexture does not actually create the texture -- that happens after it is first rendered or Create() is called. Perhaps adding a call to Create() before assigning it to the material would get rid of the error.

answered Jan 28 '10 at 02:26 AM

Molix
4.8k ● 15 ● 27 ● 66

Good answer but, unfortunately it has no effect

Jan 28 '10 at 07:38 PM Kevin Laity

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Problem Assigning RenderTexture to Material

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