DOTLAN EveMaps

The visual distortions produced by mescaline are somewhat different from those of LSD. The subjective "open-eye visuals" are not true hallucinations as they are consistent with actual experience and manifest as intensifications and alterations of existing stimuli (objects and sounds), not the appearance of non-existent fanciful objects or actions that the user believes are real; the appearance of non-existent persons or objects is a feature of true hallucinations, and believing that the hallucinations are "real" is a defining feature of delusions, which is not a "typical" effect of mescaline. Prominence of color is distinctive, appearing brilliant and intense. Recurring visual patterns observed during the mescaline experience include stripes, checkerboards, angular spikes, multicolored dots, and very simple fractals which turn very complex.
by wikipedia