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Is there a specific way to have blur reflexion in Kray???

You need to set the value you want in lightwaves material editor.
If you want to improve the quality of the blurred reflections you can either improve AA or increase the values found in krays gui: quality/reflection-refraction quality. As standard it's set to min100max100 wich should be sufficient for most situations "Blurring accuracy limit" lets you control how accurate the reflections should be. As default kray uses almost only the irradiancemap for the blurredreflections but sometimes thats not enough since reflections can show up as spotty/speccy patterns and then you need to increase this tresholdvalue to for example 50%=50 irradiancemap mixed with 50% real accurate raytraced reflections (yes takes longer time)
Be in touch if you get into troubles.

pixym wrote:Is there a specific way to have blur reflexion in Kray???

actually I think it's one of the best features in kray!