. Click Open and that assignment's been made and if we select these nodes here eventually we'll be able to refresh and we see that we've got a gray scale image here. Let's connect that bump node to the bump map input on the physical material. And then finally we want to increase the bump amount because it's probably not enough. Double click on the wood paneling physical material to load its parameters and that also loads it in the sample because we have Follow Current Selection enabled. And in the special maps section here we have a Bump Map amount and it's set to low value of zero point three. Just to make it very clear in this sample I'm going to set an exaggerated value here of 10 and once that refreshes we can see that we're getting some grooves here. If you don't see that well enough you can expand the size of that sample. Wait for a moment for that to render and here we've got some pretty exaggerated grooves. Now I've only done that so that we can see that in the sample very clearly. In the final rendering we won't want a Bump Map amount of 10. I'll bring that down to something more reasonable such as a value of two and once that refreshes we can still see that there are some subtle bumps in here and that's exactly what we wanted. So that's the process of adding bitmaps to drive material parameters and those bitmaps are inside the current project Scene Assets Images. Automatic Gamma Correction is enabled for the color map and I've applied a gamma override of one point oh to the bump map so that it is interpreted as linear data.
