'I could see was my pain as a sore spot on a multicoloured "wall".' All other stimuli forming you dissipated, so then you were seeing a flat representation, or

'I could see was my pain as a sore spot on a multicoloured "wall".' All other stimuli forming you dissipated, so then you were seeing a flat representation, or screen, a map of your body and then perceived the spot radiating pain as a multicoloured spot on the wall/screen? That's what I took from that description.