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Showing results for tags 'luminance'.
Found 4 results
RiccardoT posted a topic in Lighting & RenderingHi, I've setup a simple scene with a grid and a material applyed to it and I've exported the roughness map to an AOV, I've checked the Luminance values and they are different from what I see in Nuke, do you know why this heppens? Mantra values around 0.92 Nuke Value around 0.87 I've put in the attachment both the scene and the map Roughness.zip
Hello there! I'm having kind of a hard time to solve what seems to be preety straightforward. I'm using a grid, with a point vop to displace some points on it, but I can't seem to get the displace texture animated. I'm loading it to the texture sequence in texture; if I load a single frame, it works, but with the sequence nothing shows up. Heeeeelp! Thanks in advance.
First post, and pretty new to Houdini (coming from C4d). What I'd like to do is have a flat grid of polygons that are acting as "pixels" whose color is driven by an underlying image sequence. That much I have been able to figure out using a grid of points, and then mapping a simple 1x1 square per point. I've been able to get a color per copy based on an image sequence as well, using a vopsop. What I'd like to do, is for each copy, read the luminance or color value, and be able to map an image to certain ranges of luminance. (example: black - nothing, gray - small circle, white - big circle) What i've tried so far always maps the pixel image to the whole grid, and not to the individual square. Any direction would be wonderful!! I could be heading in the complete wrong direction with this. I'll attach my hip, but without the image sequence it'll be hard to see what's going on so far. I'll upload a video as well showing the basics of what's happening so far. Pixel Grid.hipnc example.mp4
Hello, I am having strange issue - renders coming out of mantra aren't displayed consistently in various apps. I believed that I would be safe with EXRs as they are linear and should be properly displayed in apps. Pixel data are identical when inspected pixel by pixel. However I noticed slight difference when displayed in mplay, nuke, rv, djv_view Any ideas? I made sure that in Nuke I am loading linear exr and no custom lut / IP is being used in viewer. I attached sample exr so that you can test it out. Thanks, Juraj img.exr