Polygons question

Hi there! I’m making a 3D platformer for PC and I’d like it to compatible with mobile devices too. I’ve made a lot of rock models in Blender and imported 'em into Unity and everything is fine. But now I’m thinking if 3k polygons (average) for every rock is a bit to much… (I’ve just started to build my level and there is no a lot of rocks for now (about 30)).

So, the question is: 3k polygons for every rock is too much?

P.S. I want to find it out to continue… Thanks!

yes it is so much you can use unity cruncher plugin or other retopolgy softwares to turn
your high poly to low poly , or you can do it yourself ,follow this tutorial

some Softwares:

MeshLab

Atangeo

blender retopolgy tools

‘Sculpt and Retopologize’ is a good workflow to get your head around generally. Basically start with a very high poly model and then use whatever the equivalent of 3dsMax’s Freeform tools are in Blender to create a matching low-poly cage over the top. This video seems to explain the basic idea pretty well.