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Copy depth texture

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Hello! I am trying to copy a shadow map texture into another texture using glCopyTexSubImage2D but to no avail. Is it possible to copy depth data from an fbo using that function? If not, can I do it in another way? Any help appreciated.

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Yes, it works. Is the other texture a GL_DEPTH_COMPONENT format?

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as V-man saiz, it should work (Ive done it FWIW)
an alternative is just to draw that depth texture into the other FBO

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