Every week I shoot 3D there’s that dark target wedged into a tight sun blocked hole of vegetation at the end a skinny lane. The target is visible with binoculars or mostly visible. Without the ocular enhancement it’s a crap shoot. In reality I’d never take such a shot on a live animal.
Still, those targets can be counted on to exist. It could be as simple as a matter of timing. When the targets were arranged there was plenty of light. When the archers hit the range the sun is at a different angle and there is no light.
I’ve put a number of my practice targets where the light changes dramatically depending on the time of day. I practice on them at different times to get a feel for the light.
For the most part I do okay on my range. There is one target, a pig in a hole standing on a log that always feels further away and continues to frustrate shooting. I’ve put an arrow in the critter’s spine a time or two.
Light and color are significant factors when judging distance. There may be a vast array of tricks and recommendations to better improve those light compromised shots. I don’t know any of them. The only trick I know is to keep practicing the shot.