Framebuffer object with float texture clamps values

Question

I have checked this similar question, but the suggestions did not solve my problem: Low precision and clamping when writing to floating point FBO.

I

Answer 1

Do a full set of glClampColor() operations in your initGL() function:

glClampColor(GL_CLAMP_READ_COLOR, GL_FALSE);
glClampColor(GL_CLAMP_VERTEX_COLOR, GL_FALSE);
glClampColor(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);

On my system I only needed the GL_CLAMP_VERTEX_COLOR.