g t Posted May 18, 2018 Share Posted May 18, 2018 (edited) I noticed that at certain zoom levels the pixel grid is rendered unevenly. This gives the image a 'speckled' appearance as if it had light grey dots all over it. The effect is easily seen when using Ctrl+Scroll on the mouse wheel to zoom. Attached is a zoomed version of the problem, at a zoom level around 480%. I noticed this with and without hardware acceleration. To reproduce: 1. Start with new image (white background) and pixel grid enabled 2. Ctrl+Scroll mouse until around 400%-500% zoom (I was at 448% but visible at other zoom levels) --> pixel grid has speckled appearance Issues/Expectations It seems that there are a few issues that cause this effect: 1. when two pixel grid lines overlap they get darker -> expected: pixel grid should have a uniform color 2. adjacent pixel grid lines do not necessarily have their pixels in the same position, causing a seemingly random (Moiré-like) pattern -> expected: pixels in adjacent lines should line up 3. the pixel grid spacing varies, probably due to rounding. The attached example shows a spacing of either every 4 or 5 pixels. -> expected: hard to avoid. perhaps a different zoom mode that only allows zoom levels that result in a uniform pixel size? Otherwise, perhaps solid lines could be used below a certain zoom level to avoid the dotted line Moiré effect. Diagnostics Application paint.net 4.0.21 (Final 4.21.6589.7045) Build Date Montag, 15. Januar 2018 Install type Classic Hardware accelerated rendering (GPU) True Animations True DPI 96,00 (1,00x scale) Language en-US OS Windows 7 Enterprise Service Pack 1 x64 (6.1.7601.65536) (0x4) .NET Runtime 4.0.30319.42000 Physical Memory 16.263 MB CPU Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz Speed ~2712 MHz Cores / Threads 4 / 8 Features DEP, SSE, SSE2, SSE3, SSSE3, SSE4_1, SSE4_2, XSAVE Video Card NVIDIA Quadro M2000M Dedicated Video RAM 4.034 MB Dedicated System RAM 0 MB Shared System RAM 7.875 MB Vendor ID 0x10DE Device ID 0x13B0 Subsystem ID 0x80D5103C Revision 162 LUID 0x0001CBCC Flags None Outputs 2 Video Card Intel(R) HD Graphics 530 Dedicated Video RAM 192 MB Dedicated System RAM 0 MB Shared System RAM 1.632 MB Vendor ID 0x8086 Device ID 0x191B Subsystem ID 0x80D5103C Revision 6 LUID 0x0001CEE3 Flags None Outputs 0 Edited May 18, 2018 by g t Quote Link to comment Share on other sites More sharing options...
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