Hi,
I am trying to create a simple way of clean dirt of a small object to expose a code. I have spent far to long on this for how much of my game its meant to be lol.
Everything i find points to using lerp. having 2 materials and then line trace the mouse to make the touched parts of the dirt material opaque.
I tried asking ai for help but i think they have stop feeding the hamsters because it has no idea what it is talking about.
Are there any resources for this? Is this the best method. Should i just not both because its not a simple thing to create and with the amount of my game its actually in its not worth it.
Thanks in advance.
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Yes, lerp.
Moving the lerp is not really the problem, you just change a scalar parameter in the material instance. How you give the player the feeling they are cleaning it, might be the main problem.
What the player experiences varies:
One click and the dirt suddenly disappears
or
One click and the dirt slowly disappears
or
Scrubbing the mouse of the surface for a few seconds until itâs gone. And so onâŚ
Anyway, the main base color concept would look something like this:
This is extremely basic, but changing the dirt param from 1 to 0 gives
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Thanks for reply but lerp does not seem to be in 5.5.4 which is why i think the ai is throwing a spanner. I am happy for click or rub. thinking about it as my game is a clicker game clicking so it slowly gets cleaner and cleaner seems to fit.
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Lerp has been in the engine since 3.0 
Hold L and click in the material graph.
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âas if by magic the shop keeper appearedâ right click and type lerp and its not there!!
Thanks you soo much
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Here it is ( when you type âlerpâ )
Itâs what lerp stands for 
You can get it to look a lot more like dirt or dust, but that would depend on the actual example.
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Lol brilliant thanks for your help. got it working exactly how i want now. thanks
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