Native ground viewport and repetition diagnostic

Three exact1254x1254 original sources were rendered through the actual production regional-material-3 module,with its exact current terrain-stamp/LOD helpers,and the existing local regional-material-8-native-worker candidate with original native inputs. All comparisons and raw pixel buffers stayed in memory. No source edit,world,game command,approval or renderer activation occurred.

WOG-A-003576: Native material algorithm diagnostic: production switches from irregular stamps at320x240 to a repeating-pattern fallback at640x480 for the same16-physical-pixel source span,changing 76689/76800 shared pixels. The existing nonperiodic WebGL2 candidate preserves all76800 shared pixels in the same viewport-size test and in the offset shared-coordinate test,and repeats no createPattern source. Direct review retains the finer80-pixel-span candidate as unaccepted for softness/mottling and requires normal Region/Hex desktop/phone scale,detail,contact,performance and lifecycle verification before activation. No source artist bytes or approval change. This is not evidence explaining the nine earlier same-viewport composite differences.

WOG-A-003578: Native material algorithm diagnostic: production switches from irregular stamps at320x240 to a repeating-pattern fallback at640x480 for the same16-physical-pixel source span,changing 76731/76800 shared pixels. The existing nonperiodic WebGL2 candidate preserves all76800 shared pixels in the same viewport-size test and in the offset shared-coordinate test,and repeats no createPattern source. Direct review retains the finer80-pixel-span candidate as unaccepted for softness/mottling and requires normal Region/Hex desktop/phone scale,detail,contact,performance and lifecycle verification before activation. No source artist bytes or approval change. This is not evidence explaining the nine earlier same-viewport composite differences.

WOG-A-003579: Native material algorithm diagnostic: production switches from irregular stamps at320x240 to a repeating-pattern fallback at640x480 for the same16-physical-pixel source span,changing 76735/76800 shared pixels. The existing nonperiodic WebGL2 candidate preserves all76800 shared pixels in the same viewport-size test and in the offset shared-coordinate test,and repeats no createPattern source. Direct review retains the finer80-pixel-span candidate as unaccepted for softness/mottling and requires normal Region/Hex desktop/phone scale,detail,contact,performance and lifecycle verification before activation. No source artist bytes or approval change. This is not evidence explaining the nine earlier same-viewport composite differences.

All three four-pane comparison sheets were directly viewed. The production irregular stamps and the same-span nonperiodic candidate keep the distinctive native grass/soil detail. The finer80-pixel-span views have softer grain and rhythmic mottling,especially the meadow;mathematical nonperiodicity alone does not prove the requested visual quality. Do not activate this reduced span as a performance shortcut. Test candidate material at legitimate world/physical scales with foregrounds and relevant lifecycle/performance evidence before selection.

The resize comparison is a controlled algorithm test at16physical-pixel span,not a normal-camera image or a total production prevalence measurement. The production fallback has one repeat-pattern creation and three source pattern fills. The three same-view repeat checks are exact in both implementations. The offset comparison changes viewport size as well as origin;it is not a fixed-size pan failure. Initial raw backend labels default to production-stamps even on the measured fallback;use recorded repeat-call counts. None of this explains the earlier nine same-viewport whole-map differences.