Hi Maga, Hmmm...are you applying the caustic gel to the lights? try placing a cone shaped light above the water level shining down on the water, you could try applying the caustic gel in the bump or refraction channel of the water Material, when you load the gel into the picture editor (the first window) select "copy" from the first window and then select "Paste" in the second window,(this will load the gel into the Alpha channel) you will then be asked to delete the current alpha channel,select "Delete" . the third window will display the combination of the first two. now the gel can be used to drive the Alpha channels int the materials editor. now save the gel in your presets so you don't have to load it and do all that stuff again. Hope this isnt adding to the confusion, i'm not sure what caused the "Egg" Artifact, Your Image is filling up and sometimes when you introduce alot of lights ,objects and gels , you get wierd shadowing, try disabling shadows on objects to don't require them,or disable cast shadows in the light editor. is the water a volumetric slab or an infinite plane? Light reacts differently in Slabs. Hope this helps Hawkfyr

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